CVE-2026-18686: Gl.inet Gl-MT3000

Critical severity, CVSS 9.8. EPSS: 4.7% chance of exploitation in the next 30 days.

A vulnerability was detected in GL.iNet GL-MT3000 up to 4.4.5. The affected element is the function nas-web.add_user of the file /cgi-bin/glc of the component nas-web RPC Wrapper. Performing a manipulation results in command injection. The attack can be initiated remotely. The exploit is now public and may be used. The vendor was contacted early about this disclosure and confirmed the existence of the vulnerability.

Affected products

• Gl.inet Gl-MT3000: version 4.4.0 only; version 4.4.1 only; version 4.4.2 only; version 4.4.3 only; version 4.4.4 only; version 4.4.5 only

Published 2026-08-04. Last modified 2026-08-12.