This week, PrintNightmare – Microsoft’s Print Spooler vulnerability (CVE-2021-34527) was upgraded from a ‘Low’ criticality to a ‘Critical’ criticalness. This is due to a Proof of Concept published on GitHub, which attackers could potentially leverage for gaining access to Domain Controllers. Microsoft already released a patch in June 2021, but it wasn’t enough to stop exploits. You can find all you need to know about this vulnerability in this article and how you can mitigate it.
Source: https://thehackernews.com/2021/07/how-to-mitigate-microsoft-print-spooler.html