KLA11068
Denial of Service Vulnerability in Microsoft .NET Framework

An improper handling of web requests has been found in Microsoft Common Object Runtime Library. By exploiting this vulnerability malicious users can cause a denial of service. This vulnerability can be exploited by issuing specially designed requests to the .NET web application.

Microsoft .NET Framework 4.6
Microsoft .NET Framework 4.6.1
Microsoft .NET Framework 4.6.2
Microsoft .NET Framework 4.7

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