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TI-2026-04409 Aliases CVE-2026-5054GHSA-4399-fg4g-454c

NoMachine External Control of File Path Local Privilege Escalation Vulnerability

Priority LOW 35CWE-73Published · Updated

Key facts

Attack vector
Local
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
High · High · High
Fix status
No fix listed

Attack profile from CVSS 3.0 · CNA. Fix status from CNA.

Summary

NoMachine External Control of File Path Local Privilege Escalation Vulnerability. This vulnerability allows local attackers to escalate privileges on affected installations of NoMachine. An attacker must first obtain the ability to execute low-privileged code on the target system in order to exploit this vulnerability. The specific flaw exists within the handling of command line parameters. The issue results from the lack of proper validation of a user-supplied path prior to using it in file operations. An attacker can leverage this vulnerability to escalate privileges and execute arbitrary code in the context of root. Was ZDI-CAN-28630.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00218 12th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
NoMachineNoMachine9.3.7—No fix listedCNA
  • NoMachine VendorNoMachine Affected 9.3.7 Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:nomachine:nomachine:*:*:*:*:*:*:*:*before 9.4.14VulnerableNoMachine
  • cpe:2.3:a:nomachine:nomachine:*:*:*:*:*:*:*:* Versions before 9.4.14 Vulnerable ·NoMachine

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-5054
  2. 2026-10-03 Alias added: GHSA-4399-fg4g-454c

References

Advisory 1

  • 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