CVE-2025-9090: Tenda AC20 Firmware

Critical severity, CVSS 9.8. EPSS: 15.3% chance of exploitation in the next 30 days.

A vulnerability was identified in Tenda AC20 16.03.08.12. Affected is the function websFormDefine of the file /goform/telnet of the component Telnet Service. The manipulation leads to command injection. It is possible to launch the attack remotely. The exploit has been disclosed to the public and may be used.

Affected products

• Tenda AC20 Firmware: version 16.03.08.12 only

Published 2025-08-17. Last modified 2026-06-17.