Microsoft issues emergency Windows patch to fix critical ‘PrintNightmare’ vulnerability



Illustration by Alex Castro / The Verge

Microsoft has started rolling out an emergency Windows patch to address a critical flaw in the Windows Print Spooler service. The vulnerability, dubbed PrintNightmare, was revealed last week, after security researchers accidentally published proof-of-concept (PoC) exploit code. Microsoft has issued out-of-band security updates to address the flaw, and has rated it as critical as attackers can remotely execute code with system-level privileges on affected machines.

As the Print Spooler service runs by default on Windows, Microsoft has had to issue patches for Windows Server 2019, Windows Server 2012 R2, Windows Server 2008, Windows 8.1, Windows RT 8.1, and a variety of supported versions of Windows 10. Microsoft has even taken the unusual…

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