CVE-2025-5903 TOTOLINK T10 POST Request cstecgi.cgi setWiFiAclRules buffer overflow

High 8.7 Published 9 Jun 2025 Updated 10 Jun 2025

Remote attackers can trigger a buffer overflow in the TOTOLINK T10 router's WiFi ACL rule handler, potentially leading to code execution or service disruption.

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-2025-5903?

CVE-2025-5903 is a high-severity memory corruption vulnerability in TOTOLINK T10, published on 9 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 T10 4.1.8cu.5207. It has been classified as critical. Affected is the function setWiFiAclRules of the file /cgi-bin/cstecgi.cgi of the component POST Request Handler. The manipulation of the argument desc 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-2025-5903?

It affects 1 product.

Products include Totolink T10 Firmware.

How do I fix CVE-2025-5903?

No fix has been published for CVE-2025-5903 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-2025-5903 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-5903 exists.

Sources

Also known as GHSA-pwwc-x5p3-pqjj.