Trend Micro InterScan VirusWall for Windows NT 3.52 does not record the sender's IP address in the headers for a mail message when it is passed from VirusWall to the MTA, which allows remote attackers to hide the origin of the message.

Buffer overflow in pop3trap.exe for PC-cillin 2000, 2002, and 2003 allows local users to execute arbitrary code via a long input string to TCP port 110 (POP3).

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.

Trend Micro InterScan VirusWall HTTP proxy 3.6 with the "Skip scanning if Content-length equals 0" option enabled allows malicious web servers to bypass content scanning via a Content-length header set to 0, which is often ignored by HTTP clients.

InterScan VirusWall 3.52 build 1462 allows remote attackers to bypass virus protection via e-mail messages with headers that violate RFC specifications by having (or missing) space characters in unexpected places (aka "space gap"), such as (1) Content-Type :", (2) "Content-Transfer-Encoding :", (3) no space before a boundary declaration, or (4) "boundary= ", which is processed by Outlook Express.

Buffer overflow in smtpscan.dll for Trend Micro InterScan VirusWall 3.51 for Windows NT has allows remote attackers to execute arbitrary code via a certain configuration parameter.

Buffer overflow in (1) HttpSaveCVP.dll and (2) HttpSaveCSP.dll in Trend Micro InterScan VirusWall 3.5.1 allows remote attackers to execute arbitrary code.

Trend Micro InterScan VirusWall for Windows NT allows remote attackers to make configuration changes by directly calling certain CGI programs, which do not restrict access.

Buffer overflow in HttpSave.dll in Trend Micro InterScan WebManager 1.2 allows remote attackers to execute arbitrary code via a long value to a certain parameter.

Trend Micro OfficeScan Corporate Edition (aka Virus Buster) 3.53 allows remote attackers to access sensitive information from the hotdownload directory without authentication, such as the ofcscan.ini configuration file, which contains a weakly encrypted password.