Severity Rating: Critical - Revision Note: V2.1 (August 12, 2008): Added known issues link. Also added an entry to the section, Frequently Asked Questions (FAQ) Related to this Security Update, about the known issues and solutions. The solutions include a change to Microsoft Baseline Security Analyzer (MBSA) 2.1 to correctly detect this update.Summary: This security update resolves two privately reported vulnerabilities in Microsoft DirectX that could allow remote code execution if a user opens a specially crafted media file. An attacker who successfully exploited either of these vulnerabilities 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.