Summary. A remote code execution vulnerability exists when the Microsoft .NET Framework fails to validate input properly. An attacker who successfully exploited this vulnerability could take control of an affected system.

This security update addresses the vulnerability by correcting the way that .NET Framework handles high-load/high-density network connections. To learn more about this vulnerability, see Microsoft Common Vulnerabilities and Exposures CVE-2018-8360. Important.

Fixes an issue in which MP4 files do not play correctly in Windows 8.1, Windows RT 8.1, or Windows Server 2012 R2.

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