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7.8

NoMachine Privilege Escalation Risk on Local Machines

CVE-2026-5054 · published 6 months ago
Summary

NoMachine users are at risk of having their system compromised by unauthorized access if an attacker can run low-privileged code on the same machine. This can happen if the NoMachine software does not properly validate certain input paths. To mitigate this risk, update NoMachine to the latest version available.

Original advisory text
NoMachine External Control of File Path Local Privilege Escalation Vulnerability. This vulnerability allows local attackers to escalate privileges on affected installations of NoMachine. An attacke...
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.
References
Fix within
Internet-facing 14 days
Internal At next upgrade
  • Not known to be exploited
  • Needs hands-on effort to exploit
  • Gives an attacker full control
Severity
7.8 High
Exploitation
<1% chance of attack within 30 days
Type
CWE-73External Control of File Name or Path
Timeline
Published11 Apr 2026
Updated29 Oct 2026
First seen11 Apr 2026
Sources
CVE-2026-5054 · NVD
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