KLA10802
OSI vulnerability in Microsoft Developer Tools

OSI vulnerability was found in Microsoft Developer Tools. Malicious users can exploit this vulnerability to obtain sensitive information.

Microsoft .NET Framework 2.0 Service Pack 2
Microsoft .NET Framework 4.5.2
Microsoft .NET Framework 4.6
Microsoft .NET Framework 4.6.1
Microsoft .NET Framework 4.6/4.6.1
Microsoft .NET Framework 3.5.1
Microsoft .NET Framework 3.5

Install necessary updates from the KB section, that are listed in your Windows Update (Windows Update usually can be accessed from the Control Panel)