Symantec Enterprise Firewall/VPN Appliances 100, 200, and 200R running firmware before 1.63 and Gateway Security 320, 360, and 360R running firmware before 622 allow remote attackers to bypass filtering and determine whether the device is running services such as tftpd, snmpd, or isakmp via a UDP port scan with a source port of UDP 53.

Symantec Enterprise Firewall/VPN Appliances 100, 200, and 200R running firmware before 1.63 and Gateway Security 320, 360, and 360R running firmware before 622 uses a default read/write SNMP community string, which allows remote attackers to alter the firewall's configuration file.

The SMTP binding function in Symantec Firewall/VPN Appliance 200/200R firmware after 1.5Z and before 1.68, Gateway Security 360/360R and 460/460R firmware before vuild 858, and Nexland Pro800turbo, when configured for load balancing between two WANs, might send SMTP traffic to a trusted network through an untrusted network.