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Superseded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
Known issues from this month's updates
All- Resolvedfixed by KB5132061Win 11 26H2, Win 11 26H1, Win 11 25H2 +12updated 10 Nov USB audio devices might fail to start or produce no sound Some USB Audio Class 1.0 devices display Code 10 after installing Windows 11, version 26H2
- Resolvedfixed by KB5124010Win 11 26H2, Win 11 26H1, Win 11 25H2 +1updated 8 Oct Domain-joined devices might lose their secure trust relationship with the domain Some Credential Guard protected machine accounts might be unable to sign in interactively will valid domain credentials.