CVE-2025-5911 TOTOLINK EX1200T HTTP POST Request formDMZ buffer overflow

High 8.7 Published 10 Jun 2025 Updated 10 Jun 2025

Remote attackers can trigger a buffer overflow in the HTTP POST handler, potentially leading to arbitrary code execution on the device.

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-2025-5911?

CVE-2025-5911 is a high-severity memory corruption vulnerability in TOTOLINK EX1200T, published on 10 Jun 2025. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

A vulnerability was found in TOTOLINK EX1200T up to 4.1.2cu.5232_B20210713 and classified as critical. Affected by this issue is some unknown functionality of the file /boafrm/formDMZ of the component HTTP POST Request Handler. The manipulation leads to buffer overflow. The attack may be launched remotely. The exploit has been disclosed to the public and may be used.

Weakness: CWE-120, CWE-119

Which versions are affected by CVE-2025-5911?

It affects 1 product.

Products include Totolink Ex1200t Firmware.

How do I fix CVE-2025-5911?

No fix has been published for CVE-2025-5911 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-2025-5911 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-5911 exists.

Sources

Also known as GHSA-qjqq-q9g6-p92r.