Briefing Findings · Users should patch quickly: Microsoft’s SharePoint RCE
Story-specific findings extracted from this briefing's coverage. Fast Facts in the sidebar holds the canonical reference data (CEO, founded, ticker).
SharePoint issue New RCE flaw reported; unpatched systems should be updated immediately
Windows 11 performance update KB5089573 update claims to make PCs faster and more responsive
Broken hotpatch report KB5087424 hotpatch (May 2026) allegedly breaks 32-bit printing on Server 2022 (splwow64.exe 0xc0000142)
Security mitigation Microsoft Defender can automatically isolate hacked devices
Windows Copilot UI Microsoft Copilot returns as a sidebar in Windows 11
What to Watch
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Patch Microsoft SharePoint promptly for the newly reported RCE flaw, then verify exploitation is no longer possible.
r/cybersecurity
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If you run Server 2022 printing, test whether KB5087424 hotpatch impacts 32-bit printing (splwow64.exe errors).
BleepingComputer
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Watch Windows 11 release and update threads for how KB5089573 performance claims play out on real hardware.
Neowin
What Changed
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Microsoft SharePoint Has a New RCE Flaw. If You Haven’t Patched Yet, Go Do That.
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Microsoft's GitHub bans security researcher who posted zero-day Windows exploits because company 'ruined their life' — expert claims action is vindictive and promises further retaliation
Tom's Hardware
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Broader Microsoft coverage
· not part of the Users should patch quickly: Microsoft’s SharePoint RCE story
