CVE-2025-7912 TOTOLINK T6 MQTT Service recvSlaveUpgstatus buffer overflow

High 8.7 Published 20 Jul 2025 Updated 21 Jul 2025

Remote attackers can trigger a buffer overflow in the MQTT service of TOTOLINK T6 devices, 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-2025-7912?

CVE-2025-7912 is a high-severity memory corruption vulnerability in TOTOLINK T6, published on 20 Jul 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, has been found in TOTOLINK T6 4.1.5cu.748_B20211015. This issue affects the function recvSlaveUpgstatus of the component MQTT Service. The manipulation of the argument s leads to buffer overflow. The attack may be initiated remotely. The exploit has been disclosed to the public and may be used.

Weakness: CWE-120, CWE-119

Which versions are affected by CVE-2025-7912?

It affects 1 product.

Products include Totolink T6 Firmware.

How do I fix CVE-2025-7912?

No fix has been published for CVE-2025-7912 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-2025-7912 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-7912 exists.

Sources

Also known as GHSA-pfrw-775r-c344.