https://www.bleepingcomputer.com/news/microsoft/windows-10-updates-kb5006670-and-kb5006667-released/

The October 2021 Patch Update is now rolling out and Microsoft has published cumulative updates KB5006670 for recent versions of Windows 10.

This month's cumulative updates include security fixes for PCs with May 2021 Update (version 21H1), October 2020 Update (version 20H2), and May 2020 Update (version 2004).