Technical Information

Brief overview of the risk:
This security update resolves three privately reported vulnerabilities in Microsoft Office. The vulnerabilities could allow remote code execution if a specially crafted WordPerfect document file is opened in an affected version of Microsoft Office software.
Detailed Information on the risk:

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

Further information on this exploit is available at : MS13-091