Vulnerability · Published Apr 11, 2026 · Assigned by zdi
CVE-2026-5054NoMachine External Control of File Path Local Privilege Escalation Vulnerability
High 7.8
In plain English
A high-severity security flaw in NoMachine from NoMachine. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 12% of all known vulnerabilities). Ready-made attack tooling exists: public proof-of-concept code.
Official description
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.
Affected products (as reported)
Weakness: CWE-73 · Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
References
- ZDI-26-248 x_research-advisory