CVE-2025-6138 TOTOLINK T10 HTTP POST Request cstecgi.cgi setWizardCfg buffer overflow

High 8.7 Published 16 Jun 2025 Updated 17 Jun 2025

Remote attackers can trigger a buffer overflow in the TOTOLINK T10 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-2025-6138?

CVE-2025-6138 is a high-severity memory corruption vulnerability in TOTOLINK T10, 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 TOTOLINK T10 4.1.8cu.5207. Affected by this vulnerability is the function setWizardCfg of the file /cgi-bin/cstecgi.cgi of the component HTTP POST Request Handler. The manipulation of the argument ssid5g leads to buffer overflow. The attack can 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-2025-6138?

It affects 1 product.

Products include Totolink T10 Firmware.

How do I fix CVE-2025-6138?

No fix has been published for CVE-2025-6138 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-2025-6138 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-6138 exists.

Sources

Also known as GHSA-jvv4-6597-w46c.