Bulletin Severity Rating:Critical - This security update resolves a privately reported vulnerability in Microsoft Word that could allow remote code execution if a user opens a specially crafted Word file with a malformed string. 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.
Original Source: http://www.microsoft.com/technet/security/bulletin/ms07-060.mspx?pubDate=2007-10-09