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Superseded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 2026

Sun 1 Feb

Mon 2 Feb

Tue 3 Feb

Wed 4 Feb

Thu 5 Feb

Fri 6 Feb

Sat 7 Feb

Sun 8 Feb

Mon 9 Feb

Tue 10 Feb

Wed 11 Feb

Thu 12 Feb

Fri 13 Feb

Sat 14 Feb

Sun 15 Feb

Mon 16 Feb

Tue 17 Feb

Wed 18 Feb

Thu 19 Feb

Fri 20 Feb

Sat 21 Feb

Sun 22 Feb

Mon 23 Feb

Tue 24 Feb

Wed 25 Feb

Thu 26 Feb

Fri 27 Feb

Sat 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