CVE-2025-6111 Tenda FH1205 VirtualSer fromVirtualSer stack-based overflow

High 8.7 Published 16 Jun 2025 Updated 16 Jun 2025

A remote attacker can trigger a stack-based buffer overflow in the Tenda FH1205 router's VirtualSer handler, potentially leading to arbitrary code execution.

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-2025-6111?

CVE-2025-6111 is a high-severity memory corruption vulnerability in Tenda FH1205, published on 16 Jun 2025. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

A vulnerability classified as critical was found in Tenda FH1205 2.0.0.7(775). This vulnerability affects the function fromVirtualSer of the file /goform/VirtualSer. The manipulation of the argument page leads to stack-based buffer overflow. The attack can be initiated remotely. The exploit has been disclosed to the public and may be used.

Weakness: CWE-121, CWE-787, CWE-119

Which versions are affected by CVE-2025-6111?

It affects 1 product.

Products include Tenda Fh1205 Firmware.

How do I fix CVE-2025-6111?

No fix has been published for CVE-2025-6111 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-2025-6111 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-6111 exists.

Sources

Also known as GHSA-5x43-v64p-xgmj.