CVE-2020-16891

Windows Hyper-V Remote Code Execution Vulnerability

CVE-2020-16891 is fixed in 25 products on 1 platform, first by KB4580346, released October 13, 2020. It is not reported as exploited. Patch Radar priority: Urgent.

Urgent
CVSS
8.8
Critical
Exploitation
None reported
Exploitation Less Likely
CISA KEV
Not listed
Not in the Known Exploited Vulnerabilities catalog
EPSS
0.0095
61st percentile

<p>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.</p> <p>An attacker who successfully exploited the vulnerability could execute arbitrary code on the host operating system.</p> <p>The security update addresses the vulnerability by correcting how Hyper-V validates guest operating system user input.</p>

Where it's fixed

ProductFixed inFixReleased
Microsoft
Windows 10 Version 1607 for x64-based Systems 14393.3986 KB4580346 Oct 13, 2020
Windows 10 Version 1709 for x64-based Systems 16299.2166 KB4580328 Oct 13, 2020
Windows 10 Version 1803 for x64-based Systems 17134.1792 KB4580330 Oct 13, 2020
Windows 10 Version 1809 for x64-based Systems 17763.1518 KB4577668 Oct 13, 2020
Windows 10 Version 1903 for x64-based Systems KB4577671 Oct 13, 2020
Windows 10 Version 1909 for x64-based Systems KB4577671 Oct 13, 2020
Windows 10 Version 2004 for x64-based Systems 19041.572 KB4579311 Oct 13, 2020
Windows 10 for x64-based Systems 10240.18725 KB4580327 Oct 13, 2020
Windows 7 for x64-based Systems Service Pack 1 KB4580345 Oct 13, 2020
Windows 7 for x64-based Systems Service Pack 1 KB4580387 Oct 13, 2020
Windows 8.1 for x64-based systems KB4580358 Oct 13, 2020
Windows 8.1 for x64-based systems KB4580347 Oct 13, 2020
Windows Server 2008 R2 for x64-based Systems Service Pack 1 KB4580345 Oct 13, 2020
Windows Server 2008 R2 for x64-based Systems Service Pack 1 KB4580387 Oct 13, 2020
Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation) KB4580345 Oct 13, 2020
Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation) KB4580387 Oct 13, 2020
Windows Server 2008 for x64-based Systems Service Pack 2 KB4580378 Oct 13, 2020
Windows Server 2008 for x64-based Systems Service Pack 2 KB4580385 Oct 13, 2020
Windows Server 2008 for x64-based Systems Service Pack 2 (Server Core installation) KB4580378 Oct 13, 2020
Windows Server 2008 for x64-based Systems Service Pack 2 (Server Core installation) KB4580385 Oct 13, 2020
Windows Server 2012 KB4580382 Oct 13, 2020
Windows Server 2012 KB4580353 Oct 13, 2020
Windows Server 2012 (Server Core installation) KB4580382 Oct 13, 2020
Windows Server 2012 (Server Core installation) KB4580353 Oct 13, 2020
Windows Server 2012 R2 KB4580358 Oct 13, 2020
Windows Server 2012 R2 KB4580347 Oct 13, 2020
Windows Server 2012 R2 (Server Core installation) KB4580358 Oct 13, 2020
Windows Server 2012 R2 (Server Core installation) KB4580347 Oct 13, 2020
Windows Server 2016 14393.3986 KB4580346 Oct 13, 2020
Windows Server 2016 (Server Core installation) 14393.3986 KB4580346 Oct 13, 2020
Windows Server 2019 17763.1518 KB4577668 Oct 13, 2020
Windows Server 2019 (Server Core installation) 17763.1518 KB4577668 Oct 13, 2020
Windows Server, version 1903 (Server Core installation) KB4577671 Oct 13, 2020
Windows Server, version 1909 (Server Core installation) KB4577671 Oct 13, 2020
Windows Server, version 2004 (Server Core installation) 19041.572 KB4579311 Oct 13, 2020

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