CVE-2026-111229

pfSense CE 2.7.0 through 2.9.0 contains a command injection vulnerability in services captiveportal hasync.php that allows users with only the Captive Portal HA privilege to execute commands as root. Attackers can set backwardsyncip to a malicious XMLRPC server returning connected users with shell metacharacters in ip or mac fields, which captiveportal load pfctl passes unescaped to a pfctl shell command.