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Superseded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 2030

Fri 1 Mar

Sat 2 Mar

Sun 3 Mar

Mon 4 Mar

Tue 5 Mar

Wed 6 Mar

Thu 7 Mar

Fri 8 Mar

Sat 9 Mar

Sun 10 Mar

Mon 11 Mar

Tue 12 Mar

Patch Tuesday

Wed 13 Mar

Thu 14 Mar

Fri 15 Mar

Sat 16 Mar

Sun 17 Mar

Mon 18 Mar

Tue 19 Mar

Wed 20 Mar

Thu 21 Mar

Fri 22 Mar

Sat 23 Mar

Sun 24 Mar

Mon 25 Mar

Tue 26 Mar

Wed 27 Mar

Thu 28 Mar

Fri 29 Mar

Sat 30 Mar

Sun 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