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Superseded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 · November 2025

Sat 1 Nov

Sun 2 Nov

Mon 3 Nov

Tue 4 Nov

Wed 5 Nov

Thu 6 Nov

Fri 7 Nov

Sat 8 Nov

Sun 9 Nov

Mon 10 Nov

Tue 11 Nov

Wed 12 Nov

Thu 13 Nov

Fri 14 Nov

Sat 15 Nov

Sun 16 Nov

Mon 17 Nov

Tue 18 Nov

KB5072359 · Win 11 24H2, Server 2025

Wed 19 Nov

Thu 20 Nov

KB5070312 · Win 11 23H2

Fri 21 Nov

Sat 22 Nov

Sun 23 Nov

Mon 24 Nov

Tue 25 Nov

Wed 26 Nov

Thu 27 Nov

Fri 28 Nov

Sat 29 Nov

Sun 30 Nov

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