Integer overflow in the Microsoft Malware Protection Engine (mpengine.dll), as used by Windows Live OneCare, Antigen, Defender, and Forefront Security, allows user-assisted remote attackers to execute arbitrary code via a crafted PDF file.

Sybari Antigen 8.0 SR2 does not properly filter SMTP messages, which allows remote attackers to bypass custom filter rules and send file attachments of arbitrary file types via a message with a subject of "Antigen forwarded attachment".

Sybari AntiGen for Domino 7.0 Build 722 SR2 allows remote attackers to cause a denial of service (hang) via an encrypted ZIP file with the "include full path info" option set, as used by certain variants of the Beagle/Bagle worm.