Microsoft Security Bulletin MS06-055 - Vulnerability in Vector Markup Language Could Allow Remote Code Execution (925486)
This update resolves a public vulnerability as well as additional issues discovered through internal investigations. The vulnerability is documented in the "Vulnerability Details" section of this bulletin.
If a user is logged on with administrative user rights, 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. 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.
http://www.microsoft.com/technet/security/Bulletin/MS06-055.mspx