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Superseded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 · March 2031

Sat 1 Mar

Sun 2 Mar

Mon 3 Mar

Tue 4 Mar

Wed 5 Mar

Thu 6 Mar

Fri 7 Mar

Sat 8 Mar

Sun 9 Mar

Mon 10 Mar

Tue 11 Mar

Patch Tuesday

Wed 12 Mar

Thu 13 Mar

Fri 14 Mar

Sat 15 Mar

Sun 16 Mar

Mon 17 Mar

Tue 18 Mar

Wed 19 Mar

Thu 20 Mar

Fri 21 Mar

Sat 22 Mar

Sun 23 Mar

Mon 24 Mar

Tue 25 Mar

Wed 26 Mar

Thu 27 Mar

Fri 28 Mar

Sat 29 Mar

Sun 30 Mar

Mon 31 Mar

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