CVE-2025-9581: Comfast Cf-n1 Firmware

Critical severity, CVSS 9.8. EPSS: 4.8% chance of exploitation in the next 30 days.

A vulnerability was detected in Comfast CF-N1 2.6.0. This impacts the function multi_pppoe of the file /usr/bin/webmgnt. Performing manipulation of the argument phy_interface results in command injection. The attack may be initiated remotely. The exploit is now public and may be used.

Affected products

• Comfast Cf-n1 Firmware: version 2.6.0 only

Published 2025-08-28. Last modified 2026-09-26.