GoKawiilWindows 10 KB5126657 extended security update rolls out with October Patch Tuesday fixes
Microsoft has released KB5126657 for Windows 10, available to Enterprise LTSC and ESU-enrolled devices via Windows Update. The update brings systems to build 19045.7807 (19044.7807 for LTSC 2021) and folds in this month's Patch Tuesday fixes, which addressed 1,411 vulnerabilities including one actively exploited zero-day. It also adds permanent Daylight Savings Time support for British Columbia and Alberta, a new Manitoba Standard Time zone, auditing controls for ReFS volumes on external storage, and a Storage Spaces fix.
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Since mainstream Windows 10 support has ended, updates like this now reach only paying ESU subscribers and LTSC Enterprise customers, underscoring how patching has become a narrower, fee-based channel for the OS. The scale of this month's Patch Tuesday fixes, including an exploited zero-day, suggests organisations still on Windows 10 face real urgency in applying updates despite the platform's reduced feature development.
- KB5126657 is limited to Windows 10 Enterprise LTSC and ESU-enrolled devices.
- It bundles October 2026 Patch Tuesday fixes covering 1,411 vulnerabilities, including one actively exploited zero-day.
- Non-security changes include new time zone rules for Canadian provinces and ReFS security auditing for external drives.
Microsoft Windows 10 ESU License — Since Windows 10 is now out of mainstream support, enrolling in the Extended Security Updates program is the easiest way to keep getting critical patches like this month's record Patch Tuesday fixes. It's a practical stopgap for anyone not ready to upgrade hardware to Windows 11 just yet.
See Microsoft Windows 10 ESU License on Amazon → Affiliate link — we may earn a commission on purchases, at no extra cost to you. Product picked by AI based on this article; it is not a tested recommendation.Source: bleepingcomputer.com, 2026-10-13
Published there as: “Microsoft releases Windows 10 KB5126657 extended security update”
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