An authenticated command injection vulnerability exists in status_interfaces.php via dhcp_relinquish_lease() in pfSense before 2.4.4 due to its passing user input from the $_POST parameters "ifdescr" and "ipv" to a shell without escaping the contents of the variables. This allows an authenticated WebGUI user with privileges for the affected page to execute commands in the context of the root user when submitting a request to relinquish a DHCP lease for an interface which is configured to obtain its address via DHCP.
Use CWE-78, Netgate vendor hub and Pfsense product page to widen CVE-2018-16055 into its surrounding weakness, vendor, and product context.
Compare it with CVE-2020-21487, CVE-2023-48123 and CVE-2023-42326 for nearby disclosures in the same product family.