CISA issued a security alert to warn admins to disable the Windows Print Spooler service on servers not used for printing due to the PrintNightmare zero-day vulnerability. The vulnerability resides in the PrintSpooler (spoolsv.exe) service that manages the printing process, it impacts all Windows OS versions. Microsoft addressed the flaw with the release of Microsoft June 2021 Patch Tuesday security updates. A working exploit for the CVE-2021-1675 flaw was published on GitHub earlier today, the code was likely accidentally published and the GitHub repo has been taken offline after a few hours.”]
Source: https://securityaffairs.co/wordpress/119605/security/cisa-alert-printnightmare.html