CVE-2026-2537 Comfast CF-E4 HTTP POST Request mbox-config command injection

Medium 5.1 Published 16 Feb 2026 Updated 23 Feb 2026

Remote attackers can execute arbitrary commands on Comfast CF-E4 routers via a command injection vulnerability in the HTTP POST request 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-2026-2537?

CVE-2026-2537 is a medium-severity command injection vulnerability in Comfast CF-E4, published on 16 Feb 2026. An attacker needs administrator access to exploit it, with no action from the victim.

Official description

A vulnerability was identified in Comfast CF-E4 2.6.0.1. This impacts an unknown function of the file /cgi-bin/mbox-config?method=SET&section=ntp_timezone of the component HTTP POST Request Handler. Such manipulation of the argument timestr leads to command injection. The attack may be launched remotely. The exploit is publicly available and might 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-2026-2537?

It affects 1 product.

Products include Comfast Cf-E4 Firmware.

How do I fix CVE-2026-2537?

No fix has been published for CVE-2026-2537 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-2026-2537 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-2537 exists.

Sources

Also known as GHSA-9394-fqhw-qhr3.