Critical Vuln.: PrintNightmare Exposes Windows Servers to RCE | Huntress

**PrintNightmare (CVE-2021-34527/CVE-2021-1675)** is a critical vulnerability in the Windows Print Spooler that enables local privilege escalation and remote code execution; public proof-of-concept exploits exist and Microsoft patches are incomplete or inconsistent across OS versions. Huntress verified exploitability on Server 2016/2019, observed partial patch effectiveness, and provides detection and mitigation guidance including enabling PrintService operational logging, monitoring specific spool directories and ImageLoad events, disabling the Print Spooler where feasible, or applying ACL restrictions to spool driver directories to prevent DLL drops.