CVE-2025-7089 Belkin F9K1122 webs formWanTcpipSetup stack-based overflow

High 8.7 Published 6 Jul 2025 Updated 7 Jul 2025

Remote attackers can trigger a stack-based buffer overflow in the Belkin F9K1122 router's web interface, 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-2025-7089?

CVE-2025-7089 is a high-severity memory corruption vulnerability in Belkin F9K1122, published on 6 Jul 2025. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

A vulnerability was found in Belkin F9K1122 1.00.33 and classified as critical. This issue affects the function formWanTcpipSetup of the file /goform/formWanTcpipSetup of the component webs. The manipulation of the argument pppUserName leads to stack-based buffer overflow. The attack may be initiated remotely. The exploit has been disclosed to the public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.

Weakness: CWE-121, CWE-119

Which versions are affected by CVE-2025-7089?

It affects 1 product.

Products include Belkin F9k1122 Firmware.

How do I fix CVE-2025-7089?

No fix has been published for CVE-2025-7089 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-2025-7089 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-7089 exists.

Sources

Also known as GHSA-4q5c-m4fc-h2v8.