Technical Information

Brief overview of the risk:
The vulnerability could allow remote code execution if a user opens a specially crafted file or previews a specially crafted email message in an affected version of Microsoft Office software.
Detailed Information on the risk:

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

Further information on this exploit is available at : MS13-043