https://www.bleepingcomputer.com/news/microsoft/windows-11-kb5043076-cumulative-update-released-with-19-changes/

Microsoft has released the mandatory Windows 11 23H2 KB5043076 cumulative update to fix security vulnerabilities and make 19 improvements.

KB5043076 is a mandatory Windows 11 cumulative update containing the September 2024 Patch Tuesday security updates that fix 79 vulnerabilities and four actively exploited zero-days.