CVE-2018-3963: Getcujo Smart Firewall

High severity, CVSS 8.0. EPSS: 2.6% chance of exploitation in the next 30 days.

An exploitable command injection vulnerability exists in the DHCP daemon configuration of the CUJO Smart Firewall. When adding a new static DHCP address, its corresponding hostname is inserted into the dhcpd.conf file without prior sanitization, allowing for arbitrary execution of system commands. To trigger this vulnerability, an attacker can send a DHCP request message and set up the corresponding static DHCP entry.

Affected products

• Getcujo Smart Firewall: version 7003 only

Published 2019-03-21. Last modified 2026-06-17.