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High · 7.8 Public exploit CVE-2026-5054 EUVD-2026-21653GHSA-4399-fg4g-454c

NoMachine External Control of File Path Local Privilege Escalation Vulnerability

Published Apr 11, 2026 · Updated Apr 14, 2026 · Assigned by zdi

Vendor: NoMachine Product: NoMachine

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

VendorProductAffectedFixed
NoMachine NoMachine 9.3.7 —

Public exploits

Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.

Third-party code, not reviewed by us. Public PoCs are sometimes fake or contain malware. Read the code first and run it only in an isolated lab, against systems you are authorised to test.

GitHub 1 repository

Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.

Advisories 1

References