Microsoft Exchange 2000 Server SP3, Exchange Server 2003 SP2, and Exchange Server 2007 SP1 do not properly interpret Transport Neutral Encapsulation (TNEF) properties, which allows remote attackers to execute arbitrary code via a crafted TNEF message, aka "Memory Corruption Vulnerability."
Microsoft Exchange Server 2000 SP3, 2003 SP1 and SP2, and 2007 does not properly decode certain MIME encoded e-mails, which allows remote attackers to execute arbitrary code via a crafted base64-encoded MIME e-mail message.