Zone Alarm Pro 1.0 through 5.1 gives full access to %windir%\Internet Logs\* to the EVERYONE group, which allows local users to cause a denial of service by modifying the folder contents or permissions. NOTE: this issue has been disputed by the vendor, who claims that it does not affect product functionality since the same information is also saved in a protected file

ZoneAlarm and ZoneAlarm Pro before 5.5.062, with ad-blocking enabled, allows remote web sites to cause a denial of service (application instability or system hang) via certain JavaScript.

The Mobile Code filter in ZoneAlarm Pro 5.0.590.015 does not filter mobile code within an SSL encrypted session, which could allow remote attackers to bypass the mobile code filtering. NOTE: it has been disputed by the vendor that this behavior is required by the SSL specification.

Stack-based buffer overflow in the SMTP service support in vsmon.exe in Zone Labs ZoneAlarm before 4.5.538.001, ZoneLabs Integrity client 4.0 before 4.0.146.046, and 4.5 before 4.5.085, allows remote attackers to execute arbitrary code via a long RCPT TO argument.

ZoneAlarm Pro 4.5.538.001 and possibly other versions allows remote attackers to bypass e-mail protection via attachments whose names contain certain non-English characters.

The DeviceIoControl function in the TrueVector Device Driver (VSDATANT) in ZoneAlarm before 3.7.211, Pro before 4.0.146.029, and Plus before 4.0.146.029 allows local users to gain privileges via certain signals (aka "Device Driver Attack").

ZoneAlarm Pro 3.0 and 3.1, when configured to block all traffic, allows remote attackers to cause a denial of service (CPU and memory consumption) via a large number of SYN packets (SYN flood). NOTE: the vendor was not able to reproduce the issue.

ZoneAlarm Pro 3.0 MailSafe allows remote attackers to bypass filtering and possibly execute arbitrary code via email attachments containing a trailing dot after the file extension.

ZoneAlarm 2.1 through 2.6 and ZoneAlarm Pro 2.4 and 2.6 allows local users to bypass filtering via non-standard TCP packets created with non-Windows protocol adapters.

ZoneAlarm and ZoneAlarm Pro allows a local attacker to cause a denial of service by running a trojan to initialize a ZoneAlarm mutex object which prevents ZoneAlarm from starting.