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Superseded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 2030

Tue 1 Oct

Wed 2 Oct

Thu 3 Oct

Fri 4 Oct

Sat 5 Oct

Sun 6 Oct

Mon 7 Oct

Tue 8 Oct

Patch Tuesday

Wed 9 Oct

Thu 10 Oct

Fri 11 Oct

Sat 12 Oct

Sun 13 Oct

Mon 14 Oct

Tue 15 Oct

Wed 16 Oct

Thu 17 Oct

Fri 18 Oct

Sat 19 Oct

Sun 20 Oct

Mon 21 Oct

Tue 22 Oct

Wed 23 Oct

Thu 24 Oct

Fri 25 Oct

Sat 26 Oct

Sun 27 Oct

Mon 28 Oct

Tue 29 Oct

Wed 30 Oct

Thu 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