https://wccftech.com/kb4586781-is-out-for-windows-10-versions-20h2-and-2004/

This month's Patch Tuesday Windows 10 cumulative update is now available for devices running Windows 10 October 2020 Update and the May 2020 Update. KB4586781 (Builds 19041.630 and 19042.630) brings security and quality improvements to the two feature updates of this year.

Windows 10 cumulative update KB4586781 is available via Windows Update Update, Microsoft Update Catalog, and Windows Server Update Services (WSUS).