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SANS Internet Stormcenter Daily Network/Cyber Security and Information Security Stormcast
Infostealer Targeting Android Devices This infostealer, written in Python, specifically targets Android phones. It takes advantage of Termux to gain access to data and exfiltrates it via Telegram. https://isc.sans.edu/diary/Infostealer%20Targeting%20Android%20Devices/32414 Attackers exploit recently patched Adobe Commerce Vulnerability CVE-2025-54236 Six weeks after Adobe's emergency patch, SessionReaper (CVE-2025-54236) has entered active exploitation. E-Commerce security company SanSec has detected multiple exploit attempts. https://sansec.io/research/sessionreaper-exploitation Patch for BIND and unbound nameservers CVE-2025-40780 The Internet Systems Consortium (ISC.org), as well as the Unbound project, patched a flaw that may allow for DNS spoofing due to a weak random number generator. https://kb.isc.org/docs/cve-2025-40780 WSUS Exploit Released CVE-2025-59287 Hawktrace released a walk through showing how to exploit the recently patched WSUS vulnerability https://hawktrace.com/blog/CVE-2025-59287
SANS Internet Stormcenter Daily Network/Cyber Security and Information Security Stormcast
webctrl.cgi/Blue Angel Software Suite Exploit Attempts. Maybe CVE-2025-34033 Variant? Our honeypots detected attacks that appear to exploit CVE-2025-34033 or a similar vulnerability in the Blue Angle Software Suite. https://isc.sans.edu/diary/webctrlcgiBlue+Angel+Software+Suite+Exploit+Attempts+Maybe+CVE202534033+Variant/32410 Oracle Critical Patch Update Oracle released its quarterly critical patch update. The update includes patches for 374 vulnerabilities across all of Oracle s products. There are nine more patches for Oracle s e-Business Suite. https://www.oracle.com/security-alerts/cpuoct2025.html#AppendixEBS Rust TAR Library Vulnerability A vulnerability in the popular, but no longer maintained, async-tar vulnerability could lead to arbitrary code execution https://edera.dev/stories/tarmageddon
SANS Internet Stormcenter Daily Network/Cyber Security and Information Security Stormcast
What time is it? Accuracy of pool.ntp.org. How accurate and reliable is pool.ntp.org? Turns out it is very good! https://isc.sans.edu/diary/What%20time%20is%20it%3F%20Accuracy%20of%20pool.ntp.org./32390 Xubuntu Compromise The Xubuntu website was compromised last weekend and served malware https://floss.social/@bluesabre/115401767635718361 Squid Proxy Vulnerability The Squid team fixed an information disclosure vulnerabilty that may leak authentication credentials. https://github.com/squid-cache/squid/security/advisories/GHSA-c8cc-phh7-xmxr Lanscope Endpoint Manager Vulnerablity https://jvn.jp/en/jp/JVN86318557/index.html
____________Podcast Redefining Society and Technology Podcast With Marco Ciappellihttps://redefiningsocietyandtechnologypodcast.com ____________Host Marco CiappelliCo-Founder & CMO @ITSPmagazine | Master Degree in Political Science - Sociology of Communication l Branding & Marketing Advisor | Journalist | Writer | Podcast Host | #Technology #Cybersecurity #Society
SANS Internet Stormcenter Daily Network/Cyber Security and Information Security Stormcast
Using Syscall() for Obfuscation/Fileless Activity Fileless malware written in Python can uses syscall() to create file descriptors in memory, evading signatures. https://isc.sans.edu/diary/Using%20Syscall%28%29%20for%20Obfuscation%20Fileless%20Activity/32384 AWS Outages AWS has had issues most of the day on Monday, affecting numerous services. https://health.aws.amazon.com/health/status Time Server Hack China reports a compromise of its time standard servers. https://thehackernews.com/2025/10/mss-claims-nsa-used-42-cyber-tools-in.html
SANS Internet Stormcenter Daily Network/Cyber Security and Information Security Stormcast
TikTok Videos Promoting Malware InstallationTikTok Videos Promoting Malware Installation Tiktok videos advertising ways to obtain software like Photoshop for free will instead trick users into downloading https://isc.sans.edu/diary/TikTok%20Videos%20Promoting%20Malware%20Installation/32380 Google Ads Advertise Malware Targeting MacOS Developers Hunt.io discovered Google ads that pretend to advertise tools like Homebrew and password managers to spread malware https://hunt.io/blog/macos-odyssey-amos-malware-campaign Satellite Transmissions are often unencrypted A large amount of satellite traffic is unencrypted and easily accessible to eavesdropping https://satcom.sysnet.ucsd.edu
SANS Internet Stormcenter Daily Network/Cyber Security and Information Security Stormcast
New DShield Support Slack Workspace Due to an error on Salesforce s side, we had to create a new Slack Workspace for DShield support. https://isc.sans.edu/diary/New%20DShield%20Support%20Slack/32376 Attackers Exploiting Recently Patched Cisco SNMP Flaw (CVE-2025-20352) Trend Micro published details explaining how attackers took advantage of a recently patched Cisco SNMP Vulnerability https://www.trendmicro.com/en_us/research/25/j/operation-zero-disco-cisco-snmp-vulnerability-exploit.html https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-snmp-x4LPhte Framework BIOS Backdoor The mm command impleneted in Framework BIOS shells can be used to compromise a device pre-boot. https://eclypsium.com/blog/bombshell-the-signed-backdoor-hiding-in-plain-sight-on-framework-devices/ SANS.edu Research: Mark Stephens, Validating the Effectiveness of MITRE Engage and Active Defense https://www.sans.edu/cyber-research/validating-effectiveness-mitre-engage-active-defense/
SANS Internet Stormcenter Daily Network/Cyber Security and Information Security Stormcast
Clipboard Image Stealer Xavier presents an infostealer in Python that steals images from the clipboard. https://isc.sans.edu/diary/Clipboard%20Pictures%20Exfiltration%20in%20Python%20Infostealer/32372 F5 Compromise F5 announced a wide-ranging compromise today. Source code and information about unpatched vulnerabilities were stolen. https://my.f5.com/manage/s/article/K000157005 https://my.f5.com/manage/s/article/K000156572 https://my.f5.com/manage/s/article/K000154696 Adobe Updates Adobe updated 12 different products yesterday. https://helpx.adobe.com/security.html SAP Patchday Among the critical vulnerabilities patched in SAP s products are two deserialization vulnerabilities with a CVSS score of 10.0 https://support.sap.com/en/my-support/knowledge-base/security-notes-news/october-2025.html https://onapsis.com/blog/sap-security-patch-day-october-2025/
SANS Internet Stormcenter Daily Network/Cyber Security and Information Security Stormcast
Microsoft Patch Tuesday Microsoft not only released new patches, but also the last patches for Windows 10, Office 2016, Office 2019, Exchange 2016 and Exchange 2019. https://isc.sans.edu/diary/Microsoft%20Patch%20Tuesday%20October%202025/32368 Ivanti Advisory Ivanti released an advisory with some mitigation steps users can take until the recently made public vulnerablities are patched. https://forums.ivanti.com/s/article/Security-Advisory-Ivanti-Endpoint-Manager-EPM-October-2025?language=en_US Fortinet Patches https://fortiguard.fortinet.com/psirt/FG-IR-25-010 https://fortiguard.fortinet.com/psirt/FG-IR-24-361
SANS Internet Stormcenter Daily Network/Cyber Security and Information Security Stormcast
Scans for ESAFENET CDG V5 We do see some increase in scans for the Chinese secure document management system, ESAFENET. https://isc.sans.edu/diary/Heads%20Up%3A%20Scans%20for%20ESAFENET%20CDG%20V5%20/32364 Investigating targeted payroll pirate attacks affecting US universities Microsoft wrote about how payroll pirates redirect employee paychecks via phishing. https://www.microsoft.com/en-us/security/blog/2025/10/09/investigating-targeted-payroll-pirate-attacks-affecting-us-universities/ Attacks against Edge via IE Mode Microsoft Edge offers an IE legacy mode to support websites created for Internet Explorer. The old JavaScript engine, which is part of this mode, has been abused in recent attacks, and Microsoft will make it more difficult to enable IE Mode to counter these attacks. https://microsoftedge.github.io/edgevr/posts/Changes-to-Internet-Explorer-Mode-in-Microsoft-Edge/
SANS Internet Stormcenter Daily Network/Cyber Security and Information Security Stormcast
New Oracle E-Business Suite Patches Oracle released one more patch for the e-business suite. Oracle does not state if it is already exploited, but the timing of the patch suggests that it should be expedited. https://www.oracle.com/security-alerts/alert-cve-2025-61884.html Widespread Sonicwall SSLVPN Compromise Huntress Labs observed the widespread compromise of the Sonicwall SSLVPN appliance. https://www.huntress.com/blog/sonicwall-sslvpn-compromise Active Exploitation of Gladinet CentreStack and Triofox Local File Inclusion Flaw (CVE-2025-11371) An unpatched vulnerability in the secure file sharing solutions Gladinet CentreStack and TrioFox is being exploited. https://www.huntress.com/blog/gladinet-centrestack-triofox-local-file-inclusion-flaw Two 7-Zip Vulnerabilities CVE-2025-11002, CVE-2025-11001 7-Zip patched two vulnerabilities that may lead to arbitrary code execution https://www.zerodayinitiative.com/advisories/ZDI-25-949/ https://www.zerodayinitiative.com/advisories/ZDI-25-950/
SANS Internet Stormcenter Daily Network/Cyber Security and Information Security Stormcast
Building Better Defenses: RedTail Observations Defending against attacks like RedTail is more then blocking IoCs, but instead one must focus on the techniques and tactics attackers use. https://isc.sans.edu/diary/Guest+Diary+Building+Better+Defenses+RedTail+Observations+from+a+Honeypot/32312 Sonicwall: It wasn t the user s fault Sonicwall admits to a breach resulting in the loss of user configurations stored in its cloud service https://www.sonicwall.com/support/knowledge-base/mysonicwall-cloud-backup-file-incident/250915160910330 Crowdstrike has Issues Crowdstrike fixes two vulnerabilities in the Windows version of its Falcon sensor. https://www.crowdstrike.com/en-us/security-advisories/issues-affecting-crowdstrike-falcon-sensor-for-windows/ Interrogators: Attack Surface Mapping in an Agentic World A SANS.edu master s degree student research paper by Michael Samson https://isc.sans.edu/researchpapers/pdfs/michael_samson.pdf keywords: ai; agentic; attack surface; crowdstrike; sonicwall; ivanti; zero day; initiative; redline
Join us for another episode of the Unsecurity Podcast as Megan, Brad, and Seth Bowling, lead researcher and developer at FRSecure, dive into the evolving landscape of cybersecurity for city and county governments.Seth shares how Mirrored Defense's innovative heat map visualizes the attack surface across the U.S. and presents surprising findings from their research. The trio discusses the challenges and vulnerabilities faced by local governments, the importance of proactive security measures, and how Project Broken Mirror aims to raise awareness by providing public service solutions.The crew also discusses Seth's efforts to kick-start FRSecure's vulnerability management and conditional access policy initiatives.Whether you're a cybersecurity professional or an interested citizen, this episode offers valuable insights into protecting our critical infrastructure.Don't miss out on this engaging discussion and find out how you can get involved!--Like, subscribe, and share with your network to stay informed about the latest in cybersecurity!Looking to get in touch? Reach out at unsecurity@frsecure.com and follow us for more!LinkedIn: https://www.linkedin.com/company/frsecure/Instagram: https://www.instagram.com/frsecureofficial/Facebook: https://www.facebook.com/frsecure/BlueSky: https://bsky.app/profile/frsecure.bsky.socialAbout FRSecure:https://frsecure.com/FRSecure is a mission-driven information security consultancy headquartered in Minneapolis, MN. Our team of experts is constantly developing solutions and training to assist clients in improving the measurable fundamentals of their information security programs. These fundamentals are lacking in our industry, and while progress is being made, we can't do it alone. Whether you're wondering where to start or looking for a team of experts to collaborate with you, we are ready to serve.
SANS Internet Stormcenter Daily Network/Cyber Security and Information Security Stormcast
Polymorphic Python Malware Xavier discovered self-modifying Python code on Virustotal. The remote access tool takes advantage of the inspect module to modify code on the fly. https://isc.sans.edu/diary/Polymorphic%20Python%20Malware/32354 SSH ProxyCommand Vulnerability A user cloning a git repository may be tricked into executing arbitrary code via the SSH proxycommand option. https://dgl.cx/2025/10/bash-a-newline-ssh-proxycommand-cve-2025-61984 Framelink Figma MCP Server CVE-2025-53967 Framelink Figma s MCP server suffers from a remote code execution vulnerability.
SANS Internet Stormcenter Daily Network/Cyber Security and Information Security Stormcast
FreePBX Exploit Attempts (CVE-2025-57819) A FreePBX SQL injection vulnerability disclosed in August is being used to execute code on affected systems. https://isc.sans.edu/diary/Exploit%20Against%20FreePBX%20%28CVE-2025-57819%29%20with%20code%20execution./32350 Disrupting Threats Targeting Microsoft Teams Microsoft published a blog post outlining how to better secure Teams. https://www.microsoft.com/en-us/security/blog/2025/10/07/disrupting-threats-targeting-microsoft-teams/ Kibana XSS Patch CVE-2025-25009 Elastic patched a stored XSS vulnerability in Kibana https://discuss.elastic.co/t/kibana-8-18-8-8-19-5-9-0-8-and-9-1-5-security-update-esa-2025-20/382449 QT SVG Vulnerabilities CVE-2025-10728, CVE-2025-10729, The QT group fixed two vulnerabilities in the QT SVG module. One of the vulnerabilities may be used for code execution https://www.qt.io/blog/security-advisory-uncontrolled-recursion-and-use-after-free-vulnerabilities-in-qt-svg-module-impact-qt
SANS Internet Stormcenter Daily Network/Cyber Security and Information Security Stormcast
More Details About Oracle 0-Day The exploit is now widely distributed and has been analyzed to show the nature of the underlying vulnerabilities. https://isc.sans.edu/diary/Quick%20and%20Dirty%20Analysis%20of%20Possible%20Oracle%20E-Business%20Suite%20Exploit%20Script%20%28CVE-2025-61882%29%20%5BUPDATED%5B/32346 https://labs.watchtowr.com/well-well-well-its-another-day-oracle-e-business-suite-pre-auth-rce-chain-cve-2025-61882well-well-well-its-another-day-oracle-e-business-suite-pre-auth-rce-chain-cve-2025-61882/ Redis Vulnerability Redis patched a ciritcal use after free vulnerability that could lead to arbitrary code execution. https://redis.io/blog/security-advisory-cve-2025-49844/ GoAnywhere Bug Exploited Microsoft is reporting about the exploitation of the recent GoAnywhere vulnerability https://www.microsoft.com/en-us/security/blog/2025/10/06/investigating-active-exploitation-of-cve-2025-10035-goanywhere-managed-file-transfer-vulnerability/
In this episode, Jack Cochran and Matthew James are joined by Rob Bruce, a presales leader at Syndigo with 20 years of experience, to discuss an innovative approach to presales operations: the Pursuit Desk. Rob shares how Syndigo has built a dedicated "concierge team" that handles RFPs, security questionnaires, reference coordination, and other time-consuming tasks, freeing solutions engineers to focus on discovery, solutioning, and building customer relationships. The conversation explores how to operate at the "top of your license," the role of AI in scaling pursuit operations, and practical advice for championing similar initiatives at your organization. Thank you to Elvance for sponsoring this episode: https://elvance.io Follow Us Connect with Jack Cochran: https://www.linkedin.com/in/jackcochran/ Connect with Matthew James: https://www.linkedin.com/in/matthewyoungjames/ Connect with Rob Bruce: https://www.linkedin.com/in/robbruce/ Links and Resources Mentioned Join Presales Collective Slack: https://www.presalescollective.com/slack Book: "Selling is Hard, Buying is Harder" by Garen Hess Timestamps 00:00 Welcome 04:29 What is a Presales Concierge 11:18 Presales culture 14:00 Working at the top of your diploma 17:10 How do you justify this 21:38 As focused as an F1 team 23:32 AI and the Pursuit Desk Key Topics Covered The Pursuit Desk Concept Functions as a presales concierge handling non-customer-facing tasks Manages RFPs, InfoSec documents, NDAs, reference coordination Creates centralized control over messaging and responses Operates on a global scale with cultural sensitivity Operating at the Top of Your License Focus on discovery, creative thinking, empathetic listening, and presenting solutions Eliminate time spent on administrative tasks that don't require SE expertise Reduce context switching and multitasking to maintain flow Maximize value delivery to customers and the organization Building the Business Case Find an executive sponsor to champion the initiative Measure impact through deal win rates and velocity Consider creative budget reallocation (travel budgets, etc.) Calculate ROI based on SE productivity and reduced burnout The Role of AI in Pursuit Operations AI handles first-pass RFP responses (80% completion) Pursuit desk personalizes and adds empathy (final 20%) Machine learning analyzes past deals for pattern recognition Go/no-go scorecards based on historical data Enables scaling without proportional headcount increases Presales Culture and Values Building trust through technical expertise and genuine personality Being a "chameleon" who adapts to different buyer needs Creating an environment where people feel welcomed and valued Mentorship and knowledge sharing across teams Preventing Burnout Eliminating nights and weekends spent on RFPs Reducing stress through better task distribution Enabling SEs to focus on work they're passionate about Creating sustainable workloads that retain top talent Measuring Success Tracking time spent on each RFP or pursuit activity Correlating effort to win-loss rates Building audit trails for continuous improvement Creating dashboards for data-driven decision making
SANS Internet Stormcenter Daily Network/Cyber Security and Information Security Stormcast
Oracle E-Business Suite 0-Day CVE-2025-61882 Last week, the Cl0p ransomware gang sent messages to many businesses stating that an Oracle E-Business Suite vulnerability was used to exfiltrate data. Initially, Oracle believed the root cause to be a vulnerability patched in June, but now Oracle released a patch for a new vulnerability. https://www.oracle.com/security-alerts/alert-cve-2025-61882.html Zimbra Exploit Analysis An exploit against a Zimbra system prior to the patch release is analyzed. These exploits take advantage of .ics files to breach vulnerable systems. https://strikeready.com/blog/0day-ics-attack-in-the-wild/ Unity Editor Vulnerability CVE-2025-59489 The Unity game editor suffered from a code execution vulnerablity that would also expose software developed with vulnerable versions https://unity.com/security/sept-2025-01
SANS Internet Stormcenter Daily Network/Cyber Security and Information Security Stormcast
More .well-known scans Attackers are using API documentation automatically published in the .well-known directory for reconnaissance. https://isc.sans.edu/diary/More%20.well-known%20Scans/32340 RedHat Patches Openshift AI Services A flaw was found in Red Hat Openshift AI Service. A low-privileged attacker with access to an authenticated account, for example, as a data scientist using a standard Jupyter notebook, can escalate their privileges to a full cluster administrator. https://access.redhat.com/security/cve/cve-2025-10725#cve-affected-packages TOTOLINK X6000R Vulnerabilities Paloalto released details regarding three recently patched vulnerabilities in TotalLink-X6000R routers. https://unit42.paloaltonetworks.com/totolink-x6000r-vulnerabilities/ DrayOS Vulnerability Patched Draytek fixed a single memory corruption vulnerability in its Vigor series router. An unauthenticated user may use it to execute arbitrary code. https://www.draytek.com/about/security-advisory/use-of-uninitialized-variable-vulnerabilities
SANS Internet Stormcenter Daily Network/Cyber Security and Information Security Stormcast
Comparing Honeypot Passwords with HIBP Most passwords used against our honeypots are also found in the Have I been pwn3d list. However, the few percent that are not found tend to be variations of known passwords, extending them to find likely mutations. https://isc.sans.edu/diary/%5BGuest%20Diary%5D%20Comparing%20Honeypot%20Passwords%20with%20HIBP/32310 Breaking Server SGX via DRAM Inspection By observing read and write operations to memory, it is possible to derive keys stored in SGX and break the security of systems relying on SGX. https://wiretap.fail/files/wiretap.pdf OneLogin OIDC Vulnerability A vulnerability in OneLogin can be used to read secret application keys https://www.clutch.security/blog/onelogin-many-secrets-clutch-uncovers-vulnerability-exposing-client-credentials OpenSSL Patch OpenSSL patched three vulnerabilities. One could lead to remote code execution, but the feature is used infrequently, and the exploit is difficult, according to OpenSSL
SANS Internet Stormcenter Daily Network/Cyber Security and Information Security Stormcast
Sometimes you don t even need to log in Applications using simple, predictable cookies to verify a user s identity are still exploited, and relatively recent vulnerabilities are still due to this very basic mistake. https://isc.sans.edu/diary/%22user%3Dadmin%22.%20Sometimes%20you%20don%27t%20even%20need%20to%20log%20in./32334 Western Digital My Cloud Vulnerability Western Digital patched a critical vulnerability in its MyCloud device. https://nvd.nist.gov/vuln/detail/CVE-2025-30247 sudo vulnerability exploited A recently patched vulnerability in sudo is now being exploited. https://www.sudo.ws/security/advisories/
SANS Internet Stormcenter Daily Network/Cyber Security and Information Security Stormcast
Apple Patches Apple released patches for iOS, macOS, and visionOS, fixing a single font parsing vulnerability https://isc.sans.edu/diary/Apple%20Patches%20Single%20Vulnerability%20CVE-2025-43400/32330 Increase in Scans for Palo Alto Global Protect Vulnerability (CVE-2024-3400). Our honeypots detected an increase in scans for a Palo Alto Global Protect vulnerability. https://isc.sans.edu/diary/Increase%20in%20Scans%20for%20Palo%20Alto%20Global%20Protect%20Vulnerability%20%28CVE-2024-3400%29/32328 Nimbus Manticore / Charming Kitten Malware update Checkpoint released a report with details regarding a new Nimbus Manticore exploit kit. The malware in this case uses valid SSL.com-issued certificates. https://research.checkpoint.com/2025/nimbus-manticore-deploys-new-malware-targeting-europe/
SANS Internet Stormcenter Daily Network/Cyber Security and Information Security Stormcast
Converting Timestamps in .bash_history Unix shells offer the ability to add timestamps to commands in the .bash_history file. This is often done in the form of Unix timestamps. This new tool converts these timestamps into a more readable format. https://isc.sans.edu/diary/New%20tool%3A%20convert-ts-bash-history.py/32324 Cisco ASA/FRD Compromises Exploitation of the vulnerabilities Cisco patched last week may have bone back about a year. Cisco and CISA have released advisories with help identifying affected devices. https://sec.cloudapps.cisco.com/security/center/resources/asa_ftd_continued_attacks https://www.cisa.gov/news-events/directives/ed-25-03-identify-and-mitigate-potential-compromise-cisco-devices Github Notification Phishing Github notifications are used to impersonate YCombinator and trick victims into installing a crypto drainer. https://www.bleepingcomputer.com/news/security/github-notifications-abused-to-impersonate-y-combinator-for-crypto-theft/
SANS Internet Stormcenter Daily Network/Cyber Security and Information Security Stormcast
Webshells Hiding in .well-known Places Our honeypots registered an increase in scans for URLs in the .well-known directory, which appears to be looking for webshells. https://isc.sans.edu/diary/Webshells%20Hiding%20in%20.well-known%20Places/32320 Cisco Patches Critical Exploited Vulnerabilities Cisco released updates addressing already-exploited vulnerabilities in the VPN web server for the ASA and FTD appliances. https://sec.cloudapps.cisco.com/security/center/resources/asa_ftd_continued_attacks https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asaftd-webvpn-z5xP8EUB https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asaftd-webvpn-YROOTUW XCSSET Evolves Again Microsoft detected a new XCSSET variant, an infostealer infecting X-Code projects. https://www.microsoft.com/en-us/security/blog/2025/09/25/xcsset-evolves-again-analyzing-the-latest-updates-to-xcssets-inventory/ Exploitation of Fortra GoAnywhere MFT CVE-2025-10035 watchTowr analyzed the latest GoAnywhere MFT vulnerability and exploits used against it. https://labs.watchtowr.com/it-is-bad-exploitation-of-fortra-goanywhere-mft-cve-2025-10035-part-2/
SANS Internet Stormcenter Daily Network/Cyber Security and Information Security Stormcast
Exploit Attempts Against Older Hikvision Camera Vulnerability Out honeypots observed an increase in attacks against some older Hikvision issues. A big part of the problem is weak passwords, and the ability to send credentials as part of the URL. https://isc.sans.edu/diary/Exploit%20Attempts%20Against%20Older%20Hikvision%20Camera%20Vulnerability/32316 Cisco Patches Already Exploited SNMP Vulnerability Cisco patched a stack-based buffer overflow in the SNMP subsystem. It is already exploited in the wild, but requires admin privileges to achieve code execution. https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-snmp-x4LPhte SonicWall Anti-Rootkit Update SonicWall released a firmware update for its SMA100 devices specifically designed to eradicate a commonly deployed rootkit. https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2025-0015 Extended Windows 10 Support Microsoft will extend free Windows 10 essential support for US and European customers. https://www.straitstimes.com/world/united-states/microsoft-offers-no-cost-windows-10-lifeline
In this episode of the Unsecurity Podcast, hosts Brad Nigh and Megan Larkins are joined by special guest Jim Nelson from FRSecure to dive deep into the world of cloud security. Whether you're using AWS, Azure, or GCP, understanding the right security protocols is crucial. Jim, a subject matter expert in cloud assessments, CIS benchmarks, and cloud infrastructure, shares valuable insights on common security pitfalls and best practices to enhance your cloud security posture.Topics Covered:- Introduction to cloud security challenges and opportunities.- Key areas often overlooked in cloud infrastructure security.- The importance of proper configuration and ongoing monitoring.- Best practices in identity and access management.- Effective data protection and governance strategies.- The significance of continuous vulnerability management.- Real-world experiences and lessons from security assessments.- Tips for leveraging CIS benchmarks and security frameworks.- Insights into collaboration security and conditional access policies.Join us for a comprehensive discussion that offers actionable advice to elevate your security efforts in the cloud. Perfect for InfoSec professionals and organizations looking to bolster their cloud security strategies.Here are some resources to help get you started:FRSecure's Cloud Security Checklist: https://frsecure.com/cloud-infrastructure-security-checklist/The CIS Benchmarks: https://www.cisecurity.org/cis-benchmarksDon't forget to like, subscribe, and share with your network to stay informed about the latest in cybersecurity!-- Looking to get in touch? Reach out at unsecurity@frsecure.com and follow us for more!LinkedIn: https://www.linkedin.com/company/frsecure/Instagram: https://www.instagram.com/frsecureofficial/Facebook: https://www.facebook.com/frsecure/BlueSky: https://bsky.app/profile/frsecure.bsky.socialAbout FRSecure:https://frsecure.com/ FRSecure is a mission-driven information security consultancy headquartered in Minneapolis, MN. Our team of experts is constantly developing solutions and training to assist clients in improving the measurable fundamentals of their information security programs. These fundamentals are lacking in our industry, and while progress is being made, we can't do it alone. Whether you're wondering where to start or looking for a team of experts to collaborate with you, we are ready to serve.
SANS Internet Stormcenter Daily Network/Cyber Security and Information Security Stormcast
Distracting the Analyst for Fun and Profit Our undergraduate intern, Tyler House analyzed what may have been a small DoS attack that was likely more meant to distract than to actually cause a denial of service https://isc.sans.edu/diary/%5BGuest%20Diary%5D%20Distracting%20the%20Analyst%20for%20Fun%20and%20Profit/32308 GitHub s plan for a more secure npm supply chain GitHub outlined its plan to harden the supply chain, in particular in light of the recent attack against npm packages https://github.blog/security/supply-chain-security/our-plan-for-a-more-secure-npm-supply-chain/ SolarWinds Web Help Desk AjaxProxy Deserialization of Untrusted Data Remote Code Execution Vulnerability (CVE-2025-26399) SolarWinds Web Help Desk was found to be susceptible to an unauthenticated AjaxProxy deserialization remote code execution vulnerability that, if exploited, would allow an attacker to run commands on the host machine. This vulnerability is a patch bypass of CVE-2024-28988, which in turn is a patch bypass of CVE-2024-28986. https://www.solarwinds.com/trust-center/security-advisories/cve-2025-26399 Vulnerabilities in Supermicro BMC Firmware CVE-2025-7937 CVE-2025-6198 Supermicro fixed two vulnerabilities that could allow an attacker to compromise the BMC with rogue firmware. https://www.supermicro.com/en/support/security_BMC_IPMI_Sept_2025
As CISO of Avanade—a joint venture between Accenture and Microsoft—Bob Bruns is in a unique position. He has firsthand insight into Microsoft's security roadmap from both implementation and innovation perspectives. In this episode, Bob shares his thinking on key security topics with Accenture CISO Kris Burkhardt. Listen to a CISO-to-CISO discussion about the Microsoft security ecosystem, the power of platforms, AI in security, and actions organizations can take to improve their security posture.
SANS Internet Stormcenter Daily Network/Cyber Security and Information Security Stormcast
CISA Reports Ivanti EPMM Exploit Sightings Two different organizations submitted backdoors to CISA, which are believed to have been installed using Ivanti vulnerabilities patched in May. https://www.cisa.gov/news-events/analysis-reports/ar25-261a Lastpass Observes Impersonation on GitHub Lastpass noted a number of companies being impersonated via fake GitHub repositories in order to trick victims to download Mac malware. https://blog.lastpass.com/posts/attack-targeting-macs-via-github-pages Oracle Scheduler Ransomware Ransomware has been discovered that gained access to systems via an exposed Oracle Database Scheduler service. https://labs.yarix.com/2025/09/elons-proxima-black-shadow-related-ransomware-attack-via-oracle-dbs-external-jobs/
SANS Internet Stormcenter Daily Network/Cyber Security and Information Security Stormcast
Help Wanted: What are these odd requests about? An odd request is hitting a number of our honeypots with a somewhat unusual HTTP request header. Please let me know if you no what the request is about. https://isc.sans.edu/forums/diary/Help+Wanted+What+are+these+odd+reuqests+about/32302/ Forta GoAnywhere MFT Vulnerability Forta s GoAnywhere MFT product suffers from a critical deserialization vulnerability. Forta released an advisory disclosing the vulnerability on Thursday. https://www.fortra.com/security/advisories/product-security/fi-2025-012 EDR Freeze A new tool, EDR Freeze, allows regular users to suspend EDR processes. https://www.zerosalarium.com/2025/09/EDR-Freeze-Puts-EDRs-Antivirus-Into-Coma.html
SANS Internet Stormcenter Daily Network/Cyber Security and Information Security Stormcast
Exploring Uploads in a Dshield Honeypot Environment This guest diary by one of our SANS.edu undergraduate interns shows how to analyze files uploaded to Cowrie https://isc.sans.edu/diary/Exploring%20Uploads%20in%20a%20Dshield%20Honeypot%20Environment%20%5BGuest%20Diary%5D/32296 Sonicwall Breach SonicWall MySonicWall accounts were breached via credential brute forcing https://www.sonicwall.com/support/knowledge-base/mysonicwall-cloud-backup-file-incident/250915160910330 DeepSeek Bias Cloudflare found significant biases in code created by the Chinese AI engine DeepSeek. Code for organizations not aligned with China s politics contained significantly more bugs https://www.washingtonpost.com/technology/2025/09/16/deepseek-ai-security/ Google Chrome 0-day Google fixed an already-exploited vulnerability in Google Chrome https://chromereleases.googleblog.com/2025/09/stable-channel-update-for-desktop_17.html
SANS Internet Stormcenter Daily Network/Cyber Security and Information Security Stormcast
CTRL-Z DLL Hooking Attackers may use a simple reload trick to overwrite breakpoints left by analysts to reverse malicious binaries. https://isc.sans.edu/diary/CTRL-Z%20DLL%20Hooking/32294 Global Admin in every Entra ID tenant via Actor tokens As part of September s patch Tuesday, Microsoft patched CVE-2025-55241. The discoverer of the vulnerability, Dirk-jan Mollema has published a blog post showing how this vulnerability could have been exploited. https://dirkjanm.io/obtaining-global-admin-in-every-entra-id-tenant-with-actor-tokens/ WatchGuard Firebox iked Out of Bounds Write Vulnerability CVE-2025-9242 WatchGuard patched an out-of-bounds write vulnerability, which could allow an unauthenticated attacker to compromise the devices. https://www.watchguard.com/wgrd-psirt/advisory/wgsa-2025-00015 NVidia Triton Inference Server NVIDIA patched critical vulnerabilities in its Triton Inference Server. https://nvidia.custhelp.com/app/answers/detail/a_id/5691
SANS Internet Stormcenter Daily Network/Cyber Security and Information Security Stormcast
Why You Need Phishing-Resistant Authentication NOW. The recent compromise of a number of high-profile npmjs.com accounts has yet again shown how dangerous a simple phishing email can be. https://isc.sans.edu/diary/Why%20You%20Need%20Phishing%20Resistant%20Authentication%20NOW./32290 S1ngularity/nx Attackers Strike Again A second wave of attacks has hit over a hundred npm-related GitHub repositories. The updated payload implements a worm that propagates itself to other repositories. https://www.aikido.dev/blog/s1ngularity-nx-attackers-strike-again ChatGPT s Calendar Integration Can Be Exploited to Steal Emails ChatGPT s new MCP integration can be used, via prompt injection, to affect software connected to ChatGPT via MCP. https://www.linkedin.com/posts/eito-miyamura-157305121_we-got-chatgpt-to-leak-your-private-email-activity-7372306174253256704-xoX1/
SANS Internet Stormcenter Daily Network/Cyber Security and Information Security Stormcast
Apple Updates Apple released major updates for all of its operating systems. In addition to new features, these updates patch 33 different vulnerabilities. https://isc.sans.edu/diary/Apple%20Updates%20Everything%20-%20iOS%20macOS%2026%20Edition/32286 Microsoft End of Life October 14th, support for Windows 10, Exchange 2016, and Exchange 2019 will end. https://support.microsoft.com/en-us/windows/windows-10-support-ends-on-october-14-2025-2ca8b313-1946-43d3-b55c-2b95b107f281#:~:text=As%20a%20reminder%2C%20Windows%2010,one%20that%20supports%20Windows%2011. https://techcommunity.microsoft.com/blog/exchange/t-9-months-exchange-server-2016-and-exchange-server-2019-end-of-support/4366605 Phishing Targeting Rust Developers Rust developers are reporting similar phishing emails as the emails causing the major NPM compromise last week. https://github.com/rust-lang/crates.io/discussions/11889#discussion-8886064 Samsung Patches 0-Day Samsung released its monthly updates for its flagship phones fixing, among other vulnerability, an already exploited 0-day. https://security.samsungmobile.com/securityUpdate.smsb
SANS Internet Stormcenter Daily Network/Cyber Security and Information Security Stormcast
Web Searches For Archives Didier observed additional file types being searched for as attackers continue to focus on archive files as they spider web pages https://isc.sans.edu/diary/Web%20Searches%20For%20Archives/32282 FBI Flash Alert: Salesforce Attacks The FBI is alerting users of Salesforce of two different threat actors targeting Salesforce. There are no new vulnerabilities disclosed, but the initial access usually takes advantage of social engineering or leaked data from the Salesdrift compromise. https://www.ic3.gov/CSA/2025/250912.pdf VSCode Cursor Extensions Malware Koe Security unmasked details about a recent malicious cursor extension campaign they call White Cobra. https://www.koi.security/blog/whitecobra-vscode-cursor-extensions-malware BSides Augusta https://bsidesaugusta.org/
Defensive Security Podcast - Malware, Hacking, Cyber Security & Infosec
Listen and Watch Defensive Security Episodes a week early by becoming a Patreon donor: https://www.patreon.com/defensivesec Please subscribe to our YouTube channel: Defensive Podcasts – Cyber Security & Infosec. – YouTube Links: https://blog.gitguardian.com/ghostaction-campaign-3-325-secrets-stolen/ https://www.bleepingcomputer.com/news/security/ai-powered-malware-hit-2-180-github-accounts-in-s1ngularity-attack/ https://www.cbc.ca/news/canada/hamilton/cybersecurity-breach-1.7597713 https://www.bleepingcomputer.com/news/security/6-browser-based-attacks-all-security-teams-should-be-ready-for-in-2025/ https://www.bleepingcomputer.com/news/security/hackers-use-new-hexstrike-ai-tool-to-rapidly-exploit-n-day-flaws/
SANS Internet Stormcenter Daily Network/Cyber Security and Information Security Stormcast
DShield SIEM Docker Updates Guy updated the DShield SIEM which graphically summarizes what is happening inside your honeypot. https://isc.sans.edu/diary/DShield%20SIEM%20Docker%20Updates/32276 Again: Sonicwall SSL VPN Compromises The Australian Government s Signals Directorate noted an increase in compromised Sonicwall devices. https://www.cyber.gov.au/about-us/view-all-content/alerts-and-advisories/ongoing-active-exploitation-of-sonicwall-ssl-vpns-in-australia Website Keystroke Logging Many websites log every keystroke, not just data submitted in forms. https://arxiv.org/pdf/2508.19825
SANS Internet Stormcenter Daily Network/Cyber Security and Information Security Stormcast
BASE64 Over DNS The base64 character set exceeds what is allowable in DNS. However, some implementations will work even with these invalid characters. https://isc.sans.edu/diary/BASE64%20Over%20DNS/32274 Google Chrome Update Google released an update for Google Chrome, addressing two vulnerabilities. One of the vulnerabilities is rated critical and may allow code execution. https://chromereleases.googleblog.com/2025/09/stable-channel-update-for-desktop_9.html Ivanti Updates Ivanti patched a number of vulnerabilities, several of them critical, across its product portfolio. https://forums.ivanti.com/s/article/September-Security-Advisory-Ivanti-Connect-Secure-Policy-Secure-ZTA-Gateways-and-Neurons-for-Secure-Access-Multiple-CVEs Sophos Patches Sophos resolved authentication bypass vulnerability in Sophos AP6 series wireless access point firmware (CVE-2025-10159) https://www.sophos.com/en-us/security-advisories/sophos-sa-20250909-ap6 Apple Introduces Memory Integrity Enforcement With the new hardware promoted in yesterday s event, Apple also introduced new memory integrity features based on this new hardware. https://security.apple.com/blog/memory-integrity-enforcement/
SANS Internet Stormcenter Daily Network/Cyber Security and Information Security Stormcast
Microsoft Patch Tuesday As part of its September patch Tuesday, Microsoft addressed 177 different vulnerabilities, 86 of which affect Microsoft products. None of the vulnerabilities has been exploited before today. Two of the vulnerabilities were already made public. Microsoft rates 13 of the vulnerabilities are critical. https://isc.sans.edu/diary/Microsoft%20Patch%20Tuesday%20September%202025/32270 Adobe Patches Adobe released patches for nine products, including Adobe Commerce, Coldfusion, and Acrobat. https://helpx.adobe.com/security/security-bulletin.html SAP Patches SAP patched vulnerabilities across its product portfolio. Particularly interesting are a few critical vulnerabilities in Netweaver, one of which scored a perfect 10.0 CVSS score. https://onapsis.com/blog/sap-security-notes-september-2025-patch-day/
SANS Internet Stormcenter Daily Network/Cyber Security and Information Security Stormcast
Major npm compromise A number of high-profile npm libraries were compromised after developers fell for a phishing email. This compromise affected libraries with a total of hundreds of millions of downloads a week. https://bsky.app/profile/bad-at-computer.bsky.social/post/3lydioq5swk2y https://github.com/orgs/community/discussions/172738 https://github.com/chalk/chalk/issues/656#issuecomment-3266894253 https://www.aikido.dev/blog/npm-debug-and-chalk-packages-compromised HTTP Request Signatures It looks like some search engines and AI bots are starting to use the HTTP request signature. This should make it easier to identify bot traffic. https://isc.sans.edu/diary/HTTP%20Request%20Signatures/32266
SANS Internet Stormcenter Daily Network/Cyber Security and Information Security Stormcast
From YARA Offsets to Virtual Addresses Xavier explains how to convert offsets reported by YARA into offsets suitable for the use with debuggers. https://isc.sans.edu/diary/From%20YARA%20Offsets%20to%20Virtual%20Addresses/32262 Phishing via JavaScript in SVG Files Virustotal uncovered a Colombian phishing campaign that takes advantage of JavaScript in SVG files. https://blog.virustotal.com/2025/09/uncovering-colombian-malware-campaign.html FreePBX Patches FreePBX released details regarding two vulnerabilities patched last week. One of these vulnerabilities was already actively exploited. https://github.com/FreePBX/security-reporting/security/advisories/GHSA-3r47-p39v-vqqf
SANS Internet Stormcenter Daily Network/Cyber Security and Information Security Stormcast
Unauthorized Issuance of Certificate for 1.1.1.1 Cloudflare published a blog post with more details regarding the bad 1.1.1.1 certificate that was issued by Fina. https://blog.cloudflare.com/unauthorized-issuance-of-certificates-for-1-1-1-1/ AI Model Namespace Reuse Deleted accounts on Huggingface can be taken over by other entities unrelated to the original owner. https://unit42.paloaltonetworks.com/model-namespace-reuse/ macOS vulnerability allowed Keychain and iOS app decryption without a password Excessive entitlements for the gcore binary facilitated access to key material that was sufficient to access secrets stored in Apple s keychain. https://www.helpnetsecurity.com/2025/09/04/macos-gcore-vulnerability-cve-2025-24204/
SANS Internet Stormcenter Daily Network/Cyber Security and Information Security Stormcast
Exploit Attempts for Dassault DELMIA Apriso. CVE-2025-5086 Our honeypots detected attacks against the manufacturing management system DELMIA Apriso. The deserialization vulnerability was patched in June and is one of a few critical vulnerabilities patched in recent months. https://isc.sans.edu/diary/Exploit%20Attempts%20for%20Dassault%20DELMIA%20Apriso.%20CVE-2025-5086/32256 Android Bulletin Google released its September update, fixing two already-exploited privilege escalation flaws and some remote code execution issues. https://source.android.com/docs/security/bulletin/2025-09-01 Mis-issued Certificates for SAN iPAddress:1.1.1.1 by Fina RDC 2020 Certificate authority Fina RDC issues a certificate for Cloudflare s IP address 1.1.1.1 https://groups.google.com/a/mozilla.org/g/dev-security-policy/c/SgwC1QsEpvc
SANS Internet Stormcenter Daily Network/Cyber Security and Information Security Stormcast
A Quick Look at Sextortion at Scale Jan analyzed 1900 different sextortion messages using 205 different Bitcoin addresses to look at the success rate, lifetime, and other metrics defining these campaigns. https://isc.sans.edu/diary/A%20quick%20look%20at%20sextortion%20at%20scale%3A%201%2C900%20messages%20and%20205%20Bitcoin%20addresses%20spanning%20four%20years/32252 Azure AD Client Secret Leak Attackers are stealing Azure AD client secrets from websites that are leaving them exposed. https://www.resecurity.com/blog/article/azure-ad-client-secret-leak-the-keys-to-cloud Covert Channel via ICMP and DNS A new bot combines ICMP and DNS in new ways for covert communication. The DNS requests use domains with a fixed prefix followed by a base64 encoded command, and the ICMP echo request packets include commands as a payload. https://blog.xlab.qianxin.com/mystrodx_covert_dual-mode_backdoor_en/ Official Release of Critical FreePBX Patch Sangoma has announced that the experimental patch released for the exploited FreePBX vulnerability is now considered stable, and users should update to apply it. https://community.freepbx.org/t/security-advisory-please-lock-down-your-administrator-access/107203
SANS Internet Stormcenter Daily Network/Cyber Security and Information Security Stormcast
pdf-parser: All Streams Didier released a new version of pdf-parser.py. This version fixes a problem with dumping all filtered streams. https://isc.sans.edu/diary/pdf-parser%3A%20All%20Streams/32248 Salesloft Drift Putting OAuth Tokens at Risk OAuth tokens used by Salesloft Drift users to provide access to integrations with Salesforce, Google Workspace, and others have been compromised and heavily abused for additional compromise and large-scale data exfiltration from exposed services. https://cloud.google.com/blog/topics/threat-intelligence/data-theft-salesforce-instances-via-salesloft-drift Velociraptor incident response tool abused for remote access Attackers are using the open source incident response tool Velociraptor to access remote systems in breached networks. Tools like Velocitraptor are ideal for attackers to perform lateral movement. https://news.sophos.com/en-us/2025/08/26/velociraptor-incident-response-tool-abused-for-remote-access/ Default Password in NeuVector (Rancher Desktop) SuSE fixed a default password vulnerability in NeuVector, a security tool included in Rancher Desktop. https://github.com/neuvector/neuvector/security/advisories/GHSA-8pxw-9c75-6w56
SANS Internet Stormcenter Daily Network/Cyber Security and Information Security Stormcast
Increasing Searches for ZIP Files Attackers are scanning our honeypots more and more for .zip files. They are looking for backups of credential files and the like left behind by careless administrators and developers. https://isc.sans.edu/diary/Increasing%20Searches%20for%20ZIP%20Files/32242 FreePBX Vulnerability An upatched vulnerability in FreePBX is currently being exploited. FreePBX offers mitigation advice and has also just released a beta patch. https://community.freepbx.org/t/security-advisory-please-lock-down-your-administrator-access/107203 Passwordstate Vulnerability Clickstudios patched an authentication bypass vulnerability in its password manager, Passwordstate. The vulnerability can be used to access the emergency password page. https://www.clickstudios.com.au/passwordstate-changelog.aspx
SANS Internet Stormcenter Daily Network/Cyber Security and Information Security Stormcast
Interesting Technique to Launch a Shellcode Xavier came across malware that PowerShell and the CallWindowProcA() API to launch code. https://isc.sans.edu/diary/Interesting%20Technique%20to%20Launch%20a%20Shellcode/32238 NX Compromised to Steal Wallets and Credentials The popular open source NX build package was compromised. Code was added that uses the help of AI tools like Claude and Gemini to steal credentials from affected systems https://semgrep.dev/blog/2025/security-alert-nx-compromised-to-steal-wallets-and-credentials/ Countering Chinese State-Sponsored Actors Compromise of Networks Worldwide to Feed the Global Espionage System Several law enforcement and cybersecurity agencies worldwide collaborated to release a detailed report on the recent Volt Typhoon incident. https://www.cisa.gov/news-events/cybersecurity-advisories/aa25-239a
SANS Internet Stormcenter Daily Network/Cyber Security and Information Security Stormcast
Getting a Better Handle on International Domain Names and Punycode International Domain names can be used for phishing and other attacks. One way to identify suspect names is to look for mixed script use. https://isc.sans.edu/diary/Getting%20a%20Better%20Handle%20on%20International%20Domain%20Names%20and%20Punycode/32234 Citrix Netscaler Vulnerabilities CVE-2025-7775, CVE-2025-7776 and CVE-2025-8424 Citrix patched three vulnerabilities in Netscaler. One is already being exploited https://support.citrix.com/support-home/kbsearch/article?articleNumber=CTX694938&articleTitle=NetScaler_ADC_and_NetScaler_Gateway_Security_Bulletin_for_CVE_2025_7775_CVE_2025_7776_and_CVE_2025_8424 git vulnerability exploited (CVE-2025-48384) A git vulnerability patched in early July is now being exploited https://github.com/git/git/security/advisories/GHSA-vwqx-4fm8-6qc9
SANS Internet Stormcenter Daily Network/Cyber Security and Information Security Stormcast
Reading Location Position Value in Microsoft Word Documents Jessy investigated how Word documents store the last visited document location in the registry. https://isc.sans.edu/diary/Reading%20Location%20Position%20Value%20in%20Microsoft%20Word%20Documents/32224 Weaponizing image scaling against production AI systems AI systems often downscale images before processing them. An attacker can create a harmless looking image that would reveal text after downscaling leading to prompt injection https://blog.trailofbits.com/2025/08/21/weaponizing-image-scaling-against-production-ai-systems/ IBM Jazz Team Server Vulnerability CVE-2025-36157 IBM patched a critical vulnerability in its Jazz Team Server https://www.ibm.com/support/pages/node/7242925
SANS Internet Stormcenter Daily Network/Cyber Security and Information Security Stormcast
The end of an era: Properly formatted IP addresses in all of our data. When initiall designing DShield, addresses were zero padded , an unfortunate choice. As of this week, datafeeds should no longer be zero padded . https://isc.sans.edu/diary/The%20end%20of%20an%20era%3A%20Properly%20formated%20IP%20addresses%20in%20all%20of%20our%20data./32228 .desktop files used in an attack against Linux Desktops Pakistani attackers are using .desktop files to target Indian Linux desktops. https://www.cyfirma.com/research/apt36-targets-indian-boss-linux-systems-with-weaponized-autostart-files/ Malicious Go Module Disguised as SSH Brute Forcer Exfiltrates Credentials via Telegram A go module advertising its ability to quickly brute force passwords against random IP addresses, has been used to exfiltrate credentials from the person running the module. https://socket.dev/blog/malicious-go-module-disguised-as-ssh-brute-forcer-exfiltrates-credentials Limiting Onmicrosoft Domain Usage for Sending Emails Microsoft is limiting how many emails can be sent by Microsoft 365 users using the onmicrosoft.com domain. https://techcommunity.microsoft.com/blog/exchange/limiting-onmicrosoft-domain-usage-for-sending-emails/4446167