Zone Labs IMsecure and IMsecure Pro before 1.5 allow remote attackers to bypass Active Link Filtering via an instant message containing a URL with hex encoded file extensions.
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 2.1.10 and earlier does not filter UDP packets with a source port of 67, which allows remote attackers to bypass the firewall rules.
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.