CVE-2026-77683: Comfast Cf-n1-S

Critical severity, CVSS 9.9. EPSS: 2.9% chance of exploitation in the next 30 days.

A security flaw has been discovered in Comfast CF-N1-S 2.6.0.1. Affected by this issue is the function system of the file /cgi-bin/mbox-config?method=SET&section=ntp_timezone. The manipulation of the argument timestr results in command injection. The attack can be launched remotely. The exploit has been released to the public and may be used for attacks.

Affected products

• Comfast Cf-n1-S: version 2.6.0.1 only

Published 2026-08-21. Last modified 2026-08-24.