Technical Information

Brief overview of the risk:
This security update resolves a privately reported vulnerability in Microsoft Windows Object Linking and Embedding (OLE) Automation. The vulnerability could allow remote code execution if a user opens a specially crafted 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 Object Linking and Embedding (OLE) Automation allocates memory. 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 : MS13-020