ET-3456
📛 Threat Title
Ruleset Update Summary - 2026/09/16 - v11291
Indicators of Compromise (0)
No indicators of compromise on this threat.
References (1)
- Ruleset Update Summary - 2026/09/16 - v11291 Emerging Threats Community
Remediations (10)
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web:learn.microsoft.com
Resolved issues in Windows 11, version 26H1 Updated (9/14): The resolution section was updated. IT administrators that deployed a temporary mitigation through Group Policy must re-enable the Group Policy and install the out-of-band update to resolve the issue. After installing the September 2026 security update KB5124012, applications that use HCS-managed virtual machines might experience ...
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web:msrc-ppe.microsoft.com
The Microsoft Security Response Center (MSRC) investigates all reports of security vulnerabilities affecting Microsoft products and services, and provides the information here as part of the ongoing effort to help you manage security risks and help keep your systems protected.
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web:msrc.microsoft.com
Discover Microsoft's Security Update Guide for detailed information on security vulnerabilities, updates , and guidance to protect your systems effectively.
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web:pureinfotech.com
KB5129195 emergency update fixes chaos caused by September 2026 Windows 11 release Microsoft is rushing out emergency Windows updates after the September security patch broke Remote Desktop, Hyper-V, and USB audio. By Mauro Huculak (@Pureinfotech) , Windows How-To Expert and IT Specialist with 23 years of experience.
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web:releasebot.io
Application Security updates WordPress remote code execution rule metadata in Cloudflare Managed and Free Rulesets to identify CVE-2026-65640, refining the rule description while keeping detection behavior and actions unchanged.
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web:support.microsoft.com
This out-of-band update for Windows 11, version 26H1 (KB5129194) includes the latest fixes and improvements. Visit the Windows release health dashboard for the latest status on this release. Improvements This out-of-band update includes the following improvements: [Security] This update includes protections documented in CVE-2026-62721, which refers to a Windows User-Mode Power Service (UMPS ...
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web:www.fantasygrounds.com
Developer Notes - 2026-09 Ruleset Updates We are continuing to work on general ruleset updates . See the main ruleset beta thread for the summary of the updates . Ruleset and Extension developers should feel free to reach out to me for help on migrating their code to the latest version during the Test channel process.
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web:www.fedramp.gov
This section contains the entire Consolidated Rules for 2026 as a standalone reference for each ruleset .
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web:www.fedramp.gov
Fiscal Year 2026 Quarter 4 September 2026-09-13 Updated Consolidated Rules for 2026 with several typo fixes, minor clarifications, and usability improvements. (See Consolidated Rules for 2026 Changelog) 2026-09-09 Opened 2 new Requests for Comment.
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web:www.windowslatest.com
Windows 11 KB5129195 is rolling out now, and it addresses multiple critical issues we found in our tests after the September 2026 update . Microsoft told me today's emergency update downloads ...
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