NoMachine getstat Command Injection Remote Code Execution Vulnerability

July 29th, 2026
ZDI-26-483 ZDI-CAN-30634

CVE ID

CVE-2026-18264

CVSS Score

8.8 AV:N/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 remote attackers to execute arbitrary code on affected installations of NoMachine. Authentication is required to exploit this vulnerability.

The specific flaw exists within the web service, which listens on TCP port 4000 by default. The issue results from the lack of proper validation of a user-supplied string before using it to execute a system call. An attacker can leverage this vulnerability to execute code in the context of the service account.

Additional Details

NoMachine has issued an update to correct this vulnerability. More details can be found at:
https://kb.nomachine.com/TR06X11869

Disclosure Timeline

  • 2026-07-24 - Vulnerability reported to vendor
  • 2026-07-29 - Coordinated public release of advisory
  • 2026-07-29 - Advisory Updated

Credit

Sajeeb Lohani

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