Security News > 2021 > July > Microsoft: PrintNightmare security updates work, start patching!
Microsoft says the emergency security updates released at the start of the week correctly patch the PrintNightmare Print Spooler vulnerability for all supported Windows versions and urges users to start applying the updates as soon as possible.
This clarified guidance comes after security researchers tagged the patches as incomplete after finding that the OOB security updates could be bypassed in specific scenarios.
"Our investigation has shown that the OOB security update is working as designed and is effective against the known printer spooling exploits and other public reports collectively being referred to as PrintNightmare," the Microsoft Security Response Center explains.
Microsoft has updated the PrintNightmare patch guidance and is now encouraging customers to update as soon as possible.
Windows 8.1 and Windows Server 2012 R2. Windows 7 SP1 and Windows Server 2008 R2 SP1. Windows Server 2008 SP2. If you cannot immediately install the security updates on your system(s), you can disable the Windows Print Spooler service to mitigate the PrintNightmare vulnerability temporarily.
Thursday night, Microsoft has also issued an emergency fix to address printing issues affecting Zebra and Dymo receipt or label printers due to changes introduced in the June 2021 cumulative update preview with the recently released KB5003690, KB5004760, and KB5004945 updates.
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