CVE-2025-11091: Tenda AC21 Firmware

High severity, CVSS 8.8. EPSS: 0.7% chance of exploitation in the next 30 days.

A security flaw has been discovered in Tenda AC21 up to 16.03.08.16. Affected by this vulnerability is the function sscanf of the file /goform/SetStaticRouteCfg. The manipulation of the argument list results in buffer overflow. The attack can be launched remotely. The exploit has been released to the public and may be exploited.

Affected products

• Tenda AC21 Firmware: up to and including 16.03.08.16

Published 2025-09-28. Last modified 2026-10-09.