Windows Print Spooler Remote Code Execution Vulnerability
https://www.tenable.com/cyber-exposure/2021-threat-landscape-retrospective
https://www.kb.cert.org/vuls/id/383432
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-1675
http://packetstormsecurity.com/files/163349/Microsoft-PrintNightmare-Proof-Of-Concept.html