Windows 10 (KB5063709 / KB5063877 / KB5063871 / KB5063889) August 2025 Patch Tuesday out

It's the second Tuesday of the month, which means it's Patch Tuesday time again. As such, today, Microsoft is rolling out the monthly security update (also called "B release") for August 2025 on Windows Server 20H2 and Windows 10 for the latest supported versions, 20H2, 21H2, and 22H2.

The new updates are being distributed under KB5063709, bumping up the builds to 19044.6216 and 19045.6216. You can find standalone links to download the new update on the Microsoft Update Catalog at this link.

The major highlight of the release is security patches. Microsoft writes:

• [Internal Windows OS] This update contains miscellaneous security improvements to internal Windows OS functionality. No specific issues are documented for this release.

This release has known issues with Noto fonts.

Some of the older Windows 10 versions have also received updates today, which have been listed below with their respective release notes (KB) linked as well as links to download them at Microsoft's Update Catalog:

It is noteworthy that Windows 10 20H2 and Windows 10 1909 reached the end of servicing. Non-LTSC editions of 21H2 have also reached the end of servicing.