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CVE Number Vulnerability Product Severity Date
CVE-2018-8439 Windows Hyper-V Remote Code Execution Vulnerability Windows 8.1 Critical 12-09-2018

Technical Information

Brief overview of the risk:
A remote code execution vulnerability exists when Windows Hyper-V on a host server fails to properly validate input from an authenticated user on a guest operating system. To exploit the vulnerability, an attacker could run a specially crafted application on a guest operating system that could cause the Hyper-V host operating system to execute arbitrary code.

Detailed Information on the risk:
An attacker who successfully exploited the vulnerability could execute arbitrary code on the host operating system.
The security update addresses the vulnerability by correcting how Hyper-V validates guest operating system user input.

Further information on this exploit is available at : CVE-2018-8439

Affected Software


Windows 8.1 for x64-based systems,
Windows Server 2012 R2,
Windows RT 8.1,
Windows Server 2012 R2 (Server Core installation),
Windows 10 for x64-based Systems,
Windows Server 2016,
Windows 10 Version 1607 for x64-based Systems,
Windows Server 2016 (Server Core installation),
Windows 10 Version 1703 for x64-based Systems,
Windows 10 Version 1709 for x64-based Systems,
Windows Server, version 1709 (Server Core Installation),
Windows 10 Version 1803 for x64-based Systems,
Windows Server, version 1803 (Server Core Installation)