Technical Information

Brief overview of the risk:
The vulnerability could allow remote code execution if a user opens a specially crafted Office document using an affected version of Microsoft Office software, or previews or opens a specially crafted email message in Outlook while using Microsoft Word as the email reader.
Detailed Information on the risk:

A remote code execution vulnerability exists in the way that Microsoft Office parses specially crafted Office files. An attacker who successfully exploited this vulnerability could take complete control of an affected system.

Further information on this exploit is available at : MS13-051