Bleepingcomputer Microsoft Releases Critical Security Updates for Windows 10 and 11
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- •Microsoft's September updates address 966 vulnerabilities, including zero-day flaws.
- •Windows 10 Enterprise LTSC 2021 support is ending soon; Extended Security Updates available.
- •Key improvements include Secure Boot certificate deployment and Remote Desktop audio fixes.
On September 9, 2026, Microsoft released cumulative security updates KB5122878 for Windows 10 and KB5124012 for Windows 11, addressing numerous vulnerabilities, including two actively exploited zero-day flaws. The updates also include adjustments for Morocco's transition to permanent UTC+00:00 and improvements in Secure Boot certificate deployment. Windows 10 Enterprise LTSC 2021 users are reminded that free support will soon end, with Extended Security Updates available. The updates fix a record-breaking 966 vulnerabilities across Microsoft products, with significant attention on Remote Desktop audio redirection issues and OMA DM Client logging improvements. The updates are critical for maintaining system security and ensuring compatibility with new signing certificates. Administrators are urged to apply these updates promptly to mitigate risks associated with the identified vulnerabilities.
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