CVE-2020-16894: Microsoft Windows 10

High severity, CVSS 7.7. EPSS: 4.9% chance of exploitation in the next 30 days.

<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>

Affected products

• Microsoft Windows 10: version 1607 only
• Microsoft Windows Server 2016: affected versions not specified

Published 2020-10-16. Last modified 2026-06-17.