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TI-2021-12845 Aliases CVE-2021-33436GHSA-669x-j2pw-grf8

NoMachine for Windows prior to version 6.15.1 and 7.5.2 suffer from local privilege…

Priority LOW 32Published · Updated

Key facts

Attack vector
Local
Privileges required
Low
User interaction
Required
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
High · High · High
Fix status
No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA.

Summary

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.

Why it matters now

EPSS 0.00287 21st percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 2

CPEVersionsRoleVendor
cpe:2.3:a:nomachine:nomachine:*:*:*:*:*:*:*:*6.0.0 to before 6.15.1; 7.0 to before 7.5.2VulnerableNoMachine
cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:*not specified by NVDRunning onMicrosoft
  • cpe:2.3:a:nomachine:nomachine:*:*:*:*:*:*:*:* Versions 6.0.0 to before 6.15.1; 7.0 to before 7.5.2 Vulnerable ·NoMachine
  • cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Microsoft

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-33436
  2. 2026-10-03 Alias added: GHSA-669x-j2pw-grf8

References

Advisory 4

  • TI-2023-20294 An arbitrary file overwrite vulnerability in NoMachine Free Edition and Enterprise Client… CVSS 3.1CRITICAL 9.1
  • TI-2018-00619 Improper input validation in NoMachine App for Android CVSS 3.0CRITICAL 9.8
  • TI-2017-09455 An unspecified server utility in NoMachine before 5.3.10 on Mac OS X and Linux allows… CVSS 3.0HIGH 8.8
  • TI-2018-12800 NoMachine before 5.3.27 and 6.x before 6.3.6 allows attackers to gain privileges via a… CVSS 3.0HIGH 7.8
  • TI-2018-05073 An uninitialised stack variable in the nxfuse component that is part of the Open Source… CVSS 3.0HIGH 7.8
  • TI-2025-07885 Uncontrolled search path in NoMachine CVSS 3.0HIGH 7.8
See all 13 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences