CVE-2025-13400: Tenda CH22 Firmware

Critical severity, CVSS 9.8. EPSS: 0.7% chance of exploitation in the next 30 days.

A vulnerability was detected in Tenda CH22 1.0.0.1. Affected is the function formWrlExtraGet of the file /goform/WrlExtraGet. Performing a manipulation of the argument chkHz results in buffer overflow. Remote exploitation of the attack is possible. The exploit is now public and may be used.

Affected products

• Tenda CH22 Firmware: version 1.0.0.1 only

Published 2025-11-19. Last modified 2026-06-17.