iDefense Security & Vulnerability Research Labs have issued two security advisories (here and here) listing weaknesses in ZoneAlarm products prior to version 7.0.362. The first one is only exploitable by a local user but there isn’t a mention of whether it’s local or from remote - but it allows the attacker total control of the computer.

You should update any ZoneAlarm products on your computer to the latest version and with the latest updates. The current version of the free ZoneAlarm firewall is 7.1.100.000. Other downloads including trial versions of their other products are here.