CVE-2023-7218 Totolink N350RT cstecgi.cgi loginAuth stack-based overflow

High 7.2 Published 8 Jan 2024 Updated 17 Jun 2025

Remote attackers can trigger a stack-based buffer overflow in the loginAuth function of Totolink N350RT routers, potentially leading to arbitrary code execution.

Exploited in the wild: Not known
Login needed: An administrator
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2023-7218?

CVE-2023-7218 is a high-severity memory corruption vulnerability in Totolink N350RT, published on 8 Jan 2024. An attacker needs administrator access to exploit it, with no action from the victim.

Official description

A vulnerability, which was classified as critical, was found in Totolink N350RT 9.3.5u.6139_B202012. Affected is the function loginAuth of the file /cgi-bin/cstecgi.cgi. The manipulation of the argument password leads to stack-based buffer overflow. It is possible to launch the attack remotely. The identifier of this vulnerability is VDB-249852. NOTE: The vendor was contacted early about this disclosure but did not respond in any way.

Weakness: CWE-121

Which versions are affected by CVE-2023-7218?

It affects 1 product.

Products include Totolink N350rt Firmware.

How do I fix CVE-2023-7218?

No fix has been published for CVE-2023-7218 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-2023-7218 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-7218 exists.

Sources

Also known as GHSA-pcwc-j2m8-3j5j.