CVE-2021-33436: Nomachine

High severity, CVSS 7.3. EPSS: 0.3% chance of exploitation in the next 30 days.

NoMachine for Windows prior to version 6.15.1 and 7.5.2 suffer from local privilege escalation due to the lack of safe DLL loading. This vulnerability allows local non-privileged users to perform DLL Hijacking via any writable directory listed under the system path and ultimately execute code as NT AUTHORITY\SYSTEM.

Affected products

• Nomachine Nomachine: from 6.0.0, before 6.15.1 (fixed in 6.15.1); from 7.0, before 7.5.2 (fixed in 7.5.2)

Published 2022-04-28. Last modified 2026-06-17.