CVE-2026-19976 COMFAST CF-N1-S mbox-config sub_44A968 command injection
Remote attackers can execute arbitrary commands via the macaddress parameter in the mbox-config CGI script of COMFAST CF-N1-S routers.
- 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-2026-19976?
CVE-2026-19976 is a medium-severity command injection vulnerability in COMFAST CF-N1-S, published on 17 Aug 2026. An attacker needs administrator access to exploit it, with no action from the victim.
Official description
A security vulnerability has been detected in COMFAST CF-N1-S 2.6.0.1. Impacted is the function sub_44A968 of the file /cgi-bin/mbox-config?method=SET§ion=ptest_macaddress. Such manipulation of the argument macaddress leads to command injection. The attack may be launched remotely. The exploit has been disclosed publicly and may be used. The vendor was contacted early about this disclosure but did not respond in any way.
Which versions are affected by CVE-2026-19976?
How do I fix CVE-2026-19976?
No fix has been published for CVE-2026-19976 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-2026-19976 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-19976 exists.
Sources
Also known as GHSA-24vp-g788-qg25.