CVE-2026-2908: Tenda HG9 Firmware

High severity, CVSS 8.8. EPSS: 1% chance of exploitation in the next 30 days.

A security vulnerability has been detected in Tenda HG9 300001138. Affected by this issue is some unknown functionality of the file /boaform/formLoopBack of the component Loopback Detection Configuration Endpoint. Such manipulation of the argument Ethtype leads to stack-based buffer overflow. The attack can be executed remotely. The exploit has been disclosed publicly and may be used.

Affected products

• Tenda HG9 Firmware: version 300001138 only

Published 2026-02-22. Last modified 2026-06-17.