CVE-2026-4466 Comfast CF-AC100 mbox-config command injection

Medium 5.1 Published 20 Mar 2026 Updated 20 Mar 2026

Remote attackers can execute arbitrary commands on Comfast CF-AC100 routers via the mbox-config CGI script, posing a critical security risk.

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-2026-4466?

CVE-2026-4466 is a medium-severity command injection vulnerability in Comfast CF-AC100, published on 20 Mar 2026. An attacker needs administrator access to exploit it, with no action from the victim.

Official description

A vulnerability has been found in Comfast CF-AC100 2.6.0.8. This affects an unknown function of the file /cgi-bin/mbox-config?method=SET&section=ntp_timezone. The manipulation leads to command injection. Remote exploitation of the attack is possible. The exploit has been disclosed to the 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-2026-4466?

How do I fix CVE-2026-4466?

No fix has been published for CVE-2026-4466 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-2026-4466 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-4466 exists.

Sources

Also known as GHSA-chcf-49r6-qhgf.