CVE-2020-16894

Windows NAT Denial of Service Vulnerability

CVE-2020-16894 is fixed in 3 products on 1 platform, first by KB4580346, released October 13, 2020. It is not reported as exploited. Patch Radar priority: High.

High
CVSS
7.7
Important
Exploitation
None reported
Exploitation Less Likely
CISA KEV
Not listed
Not in the Known Exploited Vulnerabilities catalog
EPSS
0.0494
92nd percentile

<p>A denial of service vulnerability exists when Windows Network Address Translation (NAT) on a host server fails to properly validate input from a privileged user on a guest operating system. An attacker who successfully exploited the vulnerability could cause the host server to crash.</p> <p>To exploit the vulnerability, an attacker who already has a privileged account on a guest operating system, running as a virtual machine, could run a specially crafted application that causes a host machine to crash.</p> <p>The update addresses the vulnerability by modifying how Windows NAT accesses the host.</p>

Where it's fixed

ProductFixed inFixReleased
Microsoft
Windows 10 Version 1607 for x64-based Systems 14393.3986 KB4580346 Oct 13, 2020
Windows Server 2016 14393.3986 KB4580346 Oct 13, 2020
Windows Server 2016 (Server Core installation) 14393.3986 KB4580346 Oct 13, 2020

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