Let's start with the new stuff KB5025239 introduces. Meanwhile, a Bleeping Computer report mentioned that the update would make 25 changes to Windows 11 and that it would fix 97 vulnerabilities in various Microsoft products. As such, it's difficult to pinpoint which security issues the update fixes and what it doesn't fix.
Unfortunately, Microsoft didn't mention the issues KB5025239 fixes when Windows 11 users download it. However, the fixes to various security issues for Windows 11 remain the highlight of this latest update.
Microsoft mentioned on its support page that the update comes with improvements that were a part of update KB5023778, which it released on Mar. (Photo by Beata Zawrzel/NurPhoto via Getty Images) Windows 11 KB5025239 Cumulative Update Details Windows 10 Windows 11 operating system logo is displayed on a laptop screen for illustration photo.