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.
Superseded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
Release calendar · May 2027
Sat 1 May
Sun 2 May
Mon 3 May
Tue 4 May
Wed 5 May
Thu 6 May
Fri 7 May
Sat 8 May
Sun 9 May
Mon 10 May
Tue 11 May
Wed 12 May
Thu 13 May
Fri 14 May
Sat 15 May
Sun 16 May
Mon 17 May
Tue 18 May
Wed 19 May
Thu 20 May
Fri 21 May
Sat 22 May
Sun 23 May
Mon 24 May
Tue 25 May
Wed 26 May
Thu 27 May
Fri 28 May
Sat 29 May
Sun 30 May
Mon 31 May
Patch Tuesday and security (B) releasesPreview (D) releasesOut-of-band releases.NET Framework servicing packagesEdge, Office, Teams, Defender and server releasesAll product versions