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Windows 10 KB5126657 extended security update

Security Patch Release
First reported
Last updated
Happening score
H score 20
1 unique sources, 1 articles

Summary

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Microsoft released Windows 10 KB5126657, an extended security update that rolls in October 2026 Patch Tuesday fixes for Windows 10 Enterprise LTSC and ESU-enrolled devices. The update matters because it bundles a large vulnerability set into the supported Windows 10 servicing channel and moves devices to build 19045.7807 or 19044.7807.

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Timeline

  1. 13.10.2026 22:47 1 articles · 4h ago

    Emergency out-of-band update partially fixes USB Audio Class 1.0 failures

    Mitigation Patch Update

    Microsoft released an emergency out-of-band update on September 14, 2026 that partially addressed audio failures affecting some USB Audio Class 1.0 devices after the September 2026 Windows security updates. The fix targeted 8-channel and 3D audio modes, while broader problems such as Code 10 startup errors, missing audio output, and unresponsive volume controls and sound settings remained unresolved.

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  2. 13.10.2026 22:47 2 articles · 4h ago

    Microsoft releases Windows 10 KB5126657 extended security update

    Initial Disclosure

    Microsoft released Windows 10 KB5126657 for Windows 10 Enterprise LTSC and ESU-enrolled systems, rolling in the October 2026 Patch Tuesday fixes, including 1,411 vulnerabilities across Microsoft's products and one actively exploited zero-day flaw. The update moves devices to build 19045.7807 or 19044.7807, enables permanent DST support for British Columbia and Alberta starting in November 2026, introduces Manitoba Standard Time, adds ReFS auditing and optional policy controls, fixes Storage Spaces Direct virtual disks that could remain offline, fixes File History backup and restore failures, and continues deployment of updated Secure Boot certificates.

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