Microsoft Forefront Protection 2010 for Exchange Server does not properly parse e-mail content, which might allow remote attackers to execute arbitrary code via a crafted message, aka "RCE Vulnerability."
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2014/ms14-008
http://www.securitytracker.com/id/1029744
http://www.securityfocus.com/bid/65397