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KB5126657BMonthly security release (Patch Tuesday) · 2026-10 B

Monthly security release (Patch Tuesday) for Windows 10, version 22H2 and Windows 10, version 21H2

Support article Update Catalog CVEs in Security CVE list for a ticket

Is it safe to deploy?

Pilot firstKB5126657B

Released in the last few days. Start with a pilot ring while early reports come in.

ChangeIntel's reading of public signals, not advice; check Microsoft's guidance and test before you deploy. Terms

UrgencyUnknown · evidence incomplete RiskUnknown · evidence incomplete
  • Released today
  • Some required public sources could not be fully read. The assessment may be missing issues or security fixes.
Everything in the October 2026 Patch Tuesday cycle
2Windows versions

Security evidence incomplete: Some required public sources could not be fully read. The assessment may be missing issues or security fixes.Windows release health lists no known issues from this update or the one it builds on, and none it resolves.

Applies to

From Microsoft's release-information tables
Servicing branchOS buildReleaseAvailable
Windows 10, version 22H2 19045.7807 B 2026-10 B 13 Oct 2026
Windows 10, version 21H2 19044.7807 B 2026-10 B 13 Oct 2026
ChangeIntel

An IT change radar: releases, security, known issues, retirements, documentation changes, and service status from public sources. Every item links to supporting evidence; dates and statuses can change after they are read.

Sources read 13 Oct 21:43 UTC · 252 of 253 readable · 250 fully read · documentation 235/443 current

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