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Superseded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 · October 2022

Sat 1 Oct

Sun 2 Oct

Mon 3 Oct

Tue 4 Oct

Wed 5 Oct

Thu 6 Oct

Fri 7 Oct

Sat 8 Oct

Sun 9 Oct

Mon 10 Oct

Tue 11 Oct

Wed 12 Oct

Thu 13 Oct

Fri 14 Oct

Sat 15 Oct

Sun 16 Oct

Mon 17 Oct

Tue 18 Oct

Wed 19 Oct

Thu 20 Oct

Fri 21 Oct

Sat 22 Oct

Sun 23 Oct

Mon 24 Oct

Tue 25 Oct

Wed 26 Oct

Thu 27 Oct

Fri 28 Oct

KB5020953 · Win 10 20H2, Win 10 21H1

Sat 29 Oct

Sun 30 Oct

Mon 31 Oct

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