Patch tracker / KB5131096
KB5131096: Windows 10 Version 21H2 Security Update (November 2026)
KB5131096 is a Critical security update for Windows 10 Version 21H2, released 2026-11-10. It closes 546 CVEs with a maximum CVSS of 9.8. Microsoft documents 1 known issue for this update, quoted below.
Before you deploy: Microsoft lists 1 known issue for this update.
Our data comes from Microsoft, CISA and other public sources, and it can be wrong or out of date. If you are unsure, check the linked source before you act, and tell us when we are wrong so we can fix it.
Update summary
Fixes 546 CVEs. Most severe CVSS 9.8 (Critical).
Microsoft documents 1 known issue with this update.
- USB Audio Class 1.0 devices with error Code 10 or no output
Senserva AI Opinion and rich prompt for KB5131096
Copy this prompt into Claude, ChatGPT, or Copilot. The facts are included, sourced from this page.
Full tracking and change history for KB5131096
- Released
- 2026-11-10
- Last changed
- 2026-11-10
- Changes tracked
- 1
Senserva began recording day-to-day change history on 2026-07-07, and refreshes it several times a day. Release dates are historical where Microsoft publishes them; revision history is tracked from that date forward, so it does not include changes made before then.
Check if KB5131096 is installed
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Known issues, from Microsoft
Quoted from Microsoft's support article for KB5131096 (checked 2026-11-10). Microsoft lists 1 known issue. Verify against the article before acting.
USB Audio Class 1.0 devices with error Code 10 or no output
Symptoms
After installing the September 8, 2026, Windows security update, some USB Audio Class 1.0 devices might fail to start or produce audio. Affected devices might experience one or more of the following symptoms:
The device displays an error in Device Manager: "This device cannot start (Code 10).”
No audio output.
Volume controls are unresponsive or remain at zero.
Sound settings are unresponsive or unavailable.
Some devices might function in standard stereo configurations but fail when using multichannel audio features, including 8-channel or 3D audio modes. Some customers have reported that they're able to restore audio in these cases by switching to 2-channel mode.
This issue is limited to USB Audio Class 1.0 devices.
Resolution
The symptoms experienced on devices using 8-channel or 3D audio modes are addressed in the out-of-band (OOB) update released on September 14, 2026, (KB5129236) . The remaining symptoms are addressed in (KB5131096) .
Windows release health for this update
From Microsoft's Windows release health for Windows 10, version 22H2; Windows 10, version 21H2, checked 2026-11-10. Microsoft's issue text is linked from each title.
Issues this update resolves
- USB audio devices might fail to start or produce no sound
Resolved. Microsoft last updated it 2026-11-10 09:32 PT.
CVEs fixed by this update
Sorted exploited-first, then by CVSS. Every CVE links to its Senserva page with the full risk facts, references, and a ready-to-paste AI prompt.
What the press says about this update
Trusted-source coverage of the CVEs this update fixes, pulled live from their own feeds.
Scope and sources
- Affected products
- Also released in November 2026
KB5002945
24 CVEs · CriticalKB5129299
57 CVEs · CriticalKB5129300
54 CVEs · CriticalKB5131077
625 CVEs · CriticalKB5131080
627 CVEs · CriticalKB5131085
575 CVEs · CriticalKB5131087
574 CVEs · CriticalKB5131090
592 CVEs · CriticalThe full month, summarized: Microsoft Patch Tuesday.
- Authoritative references
See this and every Microsoft update ranked by real-world risk on the Microsoft Patch Tracker.