https://www.bleepingcomputer.com/news/microsoft/windows-10-cumulative-update-kb4524570-and-kb4523205-released/

It's Patch Tuesday and Microsoft is rolling out a new cumulative update for all supported version of Windows. The cumulative update with security fixes is rolling out to PCs with November 2019 Update, May 2019 Update and October 2018 Update.

The November 2019 cumulative update for Windows 10 version 1909, 1903, and version 1809 include security enhancements for browsers, core components and other basic features.