From helpnetsecurity.com
There’s been lots of excitement around the recently announced print spooler vulnerability CVE-2021-34527, commonly referred to as PrintNightmare. The excitement stems from the fact that this vulnerability has a CVSS score of 8.8, is present in ALL Windows operating systems, has been publicly disclosed with known exploits, and allows an attacker to easily execute remote code with system privileges. This vulnerability comes from functionality that allows users to install printer drivers on their systems.