Tuesday 13 October 2026
October 2026: is it safe to deploy?
What Microsoft fixed, how urgent it is, and whether anything broke, per Windows version, from Microsoft's release tables, release health, MSRC, CISA, and what the community reports.
Superseded
Newer updates replace October 2026.
Microsoft fixed 1474 CVEs, 94 critical and 1 exploited; 1 known issue is still open; out-of-band fixes followed on 26 Oct. See November 2026 Patch Tuesday.
59 of these CVEs were added after 13 Oct 2026; the release-day timeline keeps the original publication dates.
ChangeIntel's reading of public signals, not advice; check Microsoft's guidance and test before you deploy. Terms
Release calendar · August 2021
Sun 1 Aug
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Patch Tuesday and security (B) releasesPreview (D) releasesOut-of-band releases.NET Framework servicing packagesEdge, Office, Teams, Defender and server releasesAll product versions