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Superseded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 2030

Fri 1 Nov

Sat 2 Nov

Sun 3 Nov

Mon 4 Nov

Tue 5 Nov

Wed 6 Nov

Thu 7 Nov

Fri 8 Nov

Sat 9 Nov

Sun 10 Nov

Mon 11 Nov

Tue 12 Nov

Patch Tuesday

Wed 13 Nov

Thu 14 Nov

Fri 15 Nov

Sat 16 Nov

Sun 17 Nov

Mon 18 Nov

Tue 19 Nov

Wed 20 Nov

Thu 21 Nov

Fri 22 Nov

Sat 23 Nov

Sun 24 Nov

Mon 25 Nov

Tue 26 Nov

Wed 27 Nov

Thu 28 Nov

Fri 29 Nov

Sat 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