CVE-2026-3798 Comfast CF-AC100 Request Path mbox-config sub_44AC14 command injection

Medium 5.1 Published 9 Mar 2026 Updated 10 Mar 2026

Remote attackers can execute arbitrary commands on Comfast CF-AC100 routers via a command injection flaw in the mbox-config handler.

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-2026-3798?

CVE-2026-3798 is a medium-severity command injection vulnerability in Comfast CF-AC100, published on 9 Mar 2026. An attacker needs administrator access to exploit it, with no action from the victim.

Official description

A vulnerability was detected in Comfast CF-AC100 2.6.0.8. This affects the function sub_44AC14 of the file /cgi-bin/mbox-config?method=SET&section=ping_config of the component Request Path Handler. The manipulation results in command injection. The attack may be launched remotely. The exploit is now public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.

Weakness: CWE-77, CWE-74

Which versions are affected by CVE-2026-3798?

It affects 1 product.

Products include Comfast Cf-Ac100 Firmware.

How do I fix CVE-2026-3798?

No fix has been published for CVE-2026-3798 yet. Limit exposure of the affected software until one is available.

Upgrade, and pass arguments to programs as a list instead of through a shell. More about Command injection.

Is CVE-2026-3798 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-3798 exists.

Sources

Also known as GHSA-686w-7c78-3m4c.