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.

← Sep 2026 Nov 2026 →

Superseded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

Microsoft CVEs: 1474
Critical: 94
Exploited fixed: 1
In CISA KEV: 1
Open known issues: 1
Out-of-band: 8

Release calendar · February 2027

Mon 1 Feb

Tue 2 Feb

Wed 3 Feb

Thu 4 Feb

Fri 5 Feb

Sat 6 Feb

Sun 7 Feb

Mon 8 Feb

Tue 9 Feb

Patch Tuesday

Wed 10 Feb

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Fri 12 Feb

Sat 13 Feb

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Mon 15 Feb

Tue 16 Feb

Wed 17 Feb

Thu 18 Feb

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Sat 20 Feb

Sun 21 Feb

Mon 22 Feb

Tue 23 Feb

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Thu 25 Feb

Fri 26 Feb

Sat 27 Feb

Sun 28 Feb

Patch Tuesday and security (B) releasesPreview (D) releasesOut-of-band releases.NET Framework servicing packagesEdge, Office, Teams, Defender and server releasesAll product versions