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Superseded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 · November 2025
Sat 1 Nov
Sun 2 Nov
Mon 3 Nov
Tue 4 Nov
Wed 5 Nov
Thu 6 Nov
Fri 7 Nov
Sat 8 Nov
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Mon 10 Nov
Tue 11 Nov
Wed 12 Nov
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Mon 17 Nov
Tue 18 Nov
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Sat 29 Nov
Sun 30 Nov
Patch Tuesday and security (B) releasesPreview (D) releasesOut-of-band releases.NET Framework servicing packagesEdge, Office, Teams, Defender and server releasesAll product versions