CVE-2026-18787: Gl.inet AX1800

High severity, CVSS 8.8. EPSS: 3.2% chance of exploitation in the next 30 days.

A vulnerability was identified in GL.iNet AX1800 up to 4.8.3. The affected element is the function remove_rule of the file /usr/share/gl-ngx/oui-rpc.lua of the component RPC Endpoint. The manipulation of the argument args.id leads to command injection. The attack is possible to be carried out remotely. The exploit is publicly available and might be used. The vendor was contacted early about this disclosure.

Affected products

• Gl.inet AX1800: version 4.8.0 only; version 4.8.1 only; version 4.8.2 only; version 4.8.3 only

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