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Superseded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 · April 2028

Sat 1 Apr

Sun 2 Apr

Mon 3 Apr

Tue 4 Apr

Wed 5 Apr

Thu 6 Apr

Fri 7 Apr

Sat 8 Apr

Sun 9 Apr

Mon 10 Apr

Tue 11 Apr

Patch Tuesday

Wed 12 Apr

Thu 13 Apr

Fri 14 Apr

Sat 15 Apr

Sun 16 Apr

Mon 17 Apr

Tue 18 Apr

Wed 19 Apr

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Mon 24 Apr

Tue 25 Apr

Wed 26 Apr

Thu 27 Apr

Fri 28 Apr

Sat 29 Apr

Sun 30 Apr

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