A vulnerability has been reported in Microsoft .NET Framework, which can be exploited by malicious people to compromise a user's system.
The vulnerability is caused due to an error when handling permissions of a callback function when a certain WinForm object is created and can be exploited to bypass CAS (Code Access Security) restrictions via a specially crafted XAML Browser Application (XBAP) or an untrusted .NET application.
Successful exploitation allows execution of arbitrary code.
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Subject: Microsoft .NET Framework WinForms Callback Handling Vulnerability
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