Severity Rating: Critical - Revision Note: Bulletin published.Summary: This security update resolves a privately reported vulnerability in the Microsoft Works converters. The vulnerability could allow remote code execution if a user opens a specially crafted Works file. An attacker who successfully exploited this vulnerability could gain the same user rights as the local user. Users whose accounts are configured to have fewer user rights on the system could be less impacted than users who operate with administrative user rights.

Read more at: http://www.microsoft.com/technet/security/bulletin/MS09-024.mspx?pubDate=2009-06-09