CVE-2025-9605: Tenda AC21 Firmware

Critical severity, CVSS 9.8. EPSS: 5.6% chance of exploitation in the next 30 days.

A security vulnerability has been detected in Tenda AC21 and AC23 16.03.08.16. Affected is the function GetParentControlInfo of the file /goform/GetParentControlInfo. Such manipulation of the argument mac leads to stack-based buffer overflow. The attack can be launched remotely. The exploit has been disclosed publicly and may be used.

Affected products

  • Tenda AC21 Firmware: version 16.03.08.16 only
  • Tenda AC23 Firmware: version 16.03.08.16 only

Published 2025-08-29. Last modified 2026-06-17.