Microsoft .NET Framework Class Inheritance Vulnerability

A remote code execution vulnerability exists in the way that the Microsoft .NET Framework and Silverlight framework restrict inheritance within classes. An attacker who successfully exploited this vulnerability could run arbitrary code in the security context of the logged-on user. 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.