CVE-2021-20138: Gryphonconnect Gryphon Tower Firmware

High severity, CVSS 8.8. EPSS: 3.7% chance of exploitation in the next 30 days.

An unauthenticated command injection vulnerability exists in multiple parameters in the Gryphon Tower router’s web interface at /cgi-bin/luci/rc. An unauthenticated remote attacker on the same network can execute commands as root on the device by sending a specially crafted malicious packet to the web interface.

Affected products

• Gryphonconnect Gryphon Tower Firmware: up to and including 04.0004.12

Published 2021-12-09. Last modified 2026-06-17.