A buffer overflow exists in the HELO command in Trend Micro Interscan VirusWall SMTP gateway 3.23/3.3 for NT, which may allow an attacker to execute arbitrary code.
https://exchange.xforce.ibmcloud.com/vulnerabilities/3465
http://www.securityfocus.com/bid/787
http://www.securityfocus.com/archive/1/55551
http://marc.info/?l=ntbugtraq&m=94208143007829&w=2
http://marc.info/?l=ntbugtraq&m=94199707625818&w=2
http://marc.info/?l=bugtraq&m=94210427406568&w=2