SMTP content filter engines, including (1) GFI MailSecurity for Exchange/SMTP before 7.2, (2) InterScan VirusWall before 3.52 build 1494, (3) the default configuration of MIMEDefang before 2.21, and possibly other products, do not detect fragmented emails as defined in RFC2046 ("Message Fragmentation and Reassembly") and supported in such products as Outlook Express, which allows remote attackers to bypass content filtering, including virus checking, via fragmented emails of the message/partial content type.

Buffer overflow in WebShield SMTP 4.5.44 allows remote attackers to execute arbitrary commands via a long configuration parameter to the WebShield remote management service.

The WebShield SMTP Management Tool version 4.5.44 does not properly restrict access to the management port when an IP address does not resolve to a hostname, which allows remote attackers to access the configuration via the GET_CONFIG command.