CVE-2025-6143 TOTOLINK EX1200T HTTP POST Request formNtp buffer overflow

High 8.7 Published 16 Jun 2025 Updated 17 Jun 2025

Remote attackers can trigger a buffer overflow in the HTTP POST handler, potentially leading to code execution or denial of service 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-2025-6143?

CVE-2025-6143 is a high-severity memory corruption vulnerability in TOTOLINK EX1200T, 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, which was classified as critical, was found in TOTOLINK EX1200T 4.1.2cu.5232_B20210713. Affected is an unknown function of the file /boafrm/formNtp of the component HTTP POST Request Handler. The manipulation of the argument submit-url leads to buffer overflow. It is possible to launch 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-2025-6143?

It affects 1 product.

Products include Totolink Ex1200t Firmware.

How do I fix CVE-2025-6143?

No fix has been published for CVE-2025-6143 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-2025-6143 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-6143 exists.

Sources

Also known as GHSA-7fqh-75wj-c78c.