CVE-2025-3203 Tenda W18E setModules formSetAccountList stack-based overflow

Medium 5.3 Published 4 Apr 2025 Updated 4 Apr 2025

A remote attacker can trigger a stack-based buffer overflow in the Tenda W18E router via the Password argument, potentially leading to code execution or denial of service.

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-2025-3203?

CVE-2025-3203 is a medium-severity memory corruption vulnerability in Tenda W18E, published on 4 Apr 2025. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

A vulnerability classified as problematic was found in Tenda W18E 16.01.0.11. Affected by this vulnerability is the function formSetAccountList of the file /goform/setModules. The manipulation of the argument Password leads to stack-based buffer overflow. The attack can be launched remotely. The exploit has been disclosed to the public and may be used.

Weakness: CWE-121, CWE-787, CWE-119

Which versions are affected by CVE-2025-3203?

It affects 1 product.

Products include Tenda W18e Firmware.

How do I fix CVE-2025-3203?

No fix has been published for CVE-2025-3203 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-2025-3203 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-3203 exists.

Sources

Also known as GHSA-h57j-9v3r-347h.