Windows Print Spooler Privilege Escalation

UPDATE (Feb 9, 2022): Microsoft initially patched this vulnerability without giving me any information or acknowledgement, and as such, at the time of patch release, I thought that the vulnerability was identified as CVE-2022–22718, since it was the only Print Spooler vulnerability in the release without any acknowledgement. I contacted Microsoft for clarification, and the day after the patch release, Institut For Cyber Risk and I was acknowledged for CVE-2022–21999. In this blog post, we’ll look at a Windows Print Spooler local privilege escalation vulnerability that I found and reported...