CVE-2021-33436

7.3 highEPSS 0.3%

High (7.3) in nomachine nomachine. 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.

Severity

CVSS 3.1

7.3 high

CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H

EPSS: 0.3% chance of exploitation in the next 30 days; higher than 21% of CVEs (scores of 2026-10-31)
Published: 2022-04-28
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

nomachine:nomachine

References

https://github.com/active-labs/Advisories/blob/master/2021/ACTIVE-2021-001.md
https://knowledgebase.nomachine.com/SU05S00223
https://knowledgebase.nomachine.com/SU05S00224
https://knowledgebase.nomachine.com/TR05S10236
https://github.com/active-labs/Advisories/blob/master/2021/ACTIVE-2021-001.md

Check your stack JSON