Advisory Details

March 30th, 2026

NoMachine Uncontrolled Search Path Element Local Privilege Escalation Vulnerability

ZDI-26-249
ZDI-CAN-28494

CVE ID CVE-2026-5055
CVSS SCORE 7.8, AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
AFFECTED VENDORS NoMachine
AFFECTED PRODUCTS NoMachine
VULNERABILITY DETAILS

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 NoMachine Device Server. The product loads a library from an unsecured location. An attacker can leverage this vulnerability to escalate privileges and execute arbitrary code in the context of SYSTEM.
ADDITIONAL DETAILS

Fixed in NoMachine version 9.4.14
https://kb.nomachine.com/SU03X00271
DISCLOSURE TIMELINE
  • 2025-12-24 - Vulnerability reported to vendor
  • 2026-03-30 - Coordinated public release of advisory
  • 2026-03-30 - Advisory Updated
CREDIT khongtrang
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