From bleepingcomputer.com
Microsoft has released the Windows 10 KB5021233 and KB5021237 cumulative updates for versions 22H2, version 21H2, version 21H1, and 1809 to fix security vulnerabilities and resolve twenty bugs and performance issues.
This update is not available for Windows 10 1909 or Windows 10 2004.
This Windows 10 cumulative update is mandatory and will automatically be installed by Windows Update during your servicing window. However, Windows users can manually install the updates by going to Settings, clicking on Windows Update, and selecting ‘Check for Updates.’