The May 2021 Patch Tuesday rollout obviously features a new cumulative update for Windows 10 version 20H2, which right is the most recent stable form of the operating system.
The Windows 10 version 20H2 cumulative update is KB5003173, also it comes with several security improvements, making total sense with all this is really a Patch Tuesday rollout.
According to the official changelog, this cumulative update includes security updates for Bluetooth drivers, but additionally other security refinements for the operating system when basic operations are carried out. And last but not least, it comes with updates for that Windows OLE (compound documents) security.
The state changelog doesn’t include too many details, but only mentions “security updates to Windows App Platform and Frameworks, the Windows Kernel, Windows Media, the Microsoft Scripting Engine, and the Windows Silicon Platform.”
Worthwhile to learn is that the same cumulative update can also be released to devices Windows 10 version 2004, as the two os’s share a similar codebase.
The good news is that no new known issues have been reported, though, on the other hand, you will find four different bugs you need to take a look at (all of them are detailed on the KB page linked above).
One particular problem concerns Microsoft Edge legacy, the browser that has recently been removed from Windows 10 and substituted for a Chromium successor.
“Devices with Windows installations made from custom offline media or custom ISO image may have Microsoft Edge Legacy removed by this update, although not automatically substituted with the brand new Microsoft Edge. This problem is just encountered when custom offline media or ISO images are made by slipstreaming this update in to the image without having first installed the standalone servicing stack update (SSU) released March 29, 2021 or later,” Microsoft says.
The easiest workaround for users hitting this bug is to just install the brand new Microsoft Edge on their devices.