Tuesday 8 September 2026
September 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Superseded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 September 2026.
Microsoft fixed 998 CVEs, 132 critical and 2 exploited; no open known issues found in the current public evidence; out-of-band fixes followed on 14 Sep. See November 2026 Patch Tuesday.
26 of these CVEs were added after 8 Sep 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 · June 2029
Fri 1 Jun
Sat 2 Jun
Sun 3 Jun
Mon 4 Jun
Tue 5 Jun
Wed 6 Jun
Thu 7 Jun
Fri 8 Jun
Sat 9 Jun
Sun 10 Jun
Mon 11 Jun
Tue 12 Jun
Wed 13 Jun
Thu 14 Jun
Fri 15 Jun
Sat 16 Jun
Sun 17 Jun
Mon 18 Jun
Tue 19 Jun
Wed 20 Jun
Thu 21 Jun
Fri 22 Jun
Sat 23 Jun
Sun 24 Jun
Mon 25 Jun
Tue 26 Jun
Wed 27 Jun
Thu 28 Jun
Fri 29 Jun
Sat 30 Jun
Patch Tuesday and security (B) releasesPreview (D) releasesOut-of-band releases.NET Framework servicing packagesEdge, Office, Teams, Defender and server releasesAll product versions