Technical Information

Brief overview of the risk:
The vulnerability could allow remote code execution if a user opens a specially crafted Visio file. An attacker who successfully exploited the vulnerability could gain the same user rights as the current user.
Detailed Information on the risk:

A remote code execution vulnerability exists in the way that Microsoft Visio Viewer handles memory when rendering specially crafted Visio files. An attacker who successfully exploited this vulnerability could take complete control of an affected system. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights.

Further information on this exploit is available at : MS13-023