CVE-2026-78050 Comfast CF-N1-S Web Management mbox-config sub_41AD7C stack-based overflow

Critical 9.4 Published 22 Aug 2026 Updated 24 Aug 2026

Remote attackers can trigger a stack-based buffer overflow in the web management interface, 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-2026-78050?

CVE-2026-78050 is a critical memory corruption vulnerability in Comfast CF-N1-S, published on 22 Aug 2026. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

A vulnerability was found in Comfast CF-N1-S 2.6.0.1. The affected element is the function sub_41AD7C of the file /cgi-bin/mbox-config?method=SET&section=ntp_timezone of the component Web Management. The manipulation of the argument timestr/ntp_client_enabled results in stack-based buffer overflow. It is possible to launch the attack remotely. The exploit has been made public and could be used.

Weakness: CWE-121, CWE-119

Which versions are affected by CVE-2026-78050?

How do I fix CVE-2026-78050?

No fix has been published for CVE-2026-78050 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-2026-78050 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-78050 exists.

Sources

Also known as GHSA-j397-vxh8-xhw3.