CVE-2026-2911 Tenda FH451 GstDhcpSetSer buffer overflow

High 8.7 Published 22 Feb 2026 Updated 23 Feb 2026

A remote buffer overflow in the Tenda FH451 router allows attackers to execute arbitrary code via the GstDhcpSetSer interface.

Exploited in the wild: Not known
Login needed: Any signed-in user
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2026-2911?

CVE-2026-2911 is a high-severity memory corruption vulnerability in Tenda FH451, published on 22 Feb 2026. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

A vulnerability has been found in Tenda FH451 up to 1.0.0.9. This issue affects some unknown processing of the file /goform/GstDhcpSetSer. The manipulation leads to buffer overflow. It is possible to initiate the attack remotely. The exploit has been disclosed to the public and may be used.

Weakness: CWE-120, CWE-119

Which versions are affected by CVE-2026-2911?

It affects 1 product.

Products include Tenda Fh451 Firmware.

How do I fix CVE-2026-2911?

No fix has been published for CVE-2026-2911 yet. Limit exposure of the affected software until one is available.

Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.

Is CVE-2026-2911 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-2911 exists.

Sources

Also known as GHSA-qf2x-h525-fc86.