CVE-2020-16894

Windows NAT Denial of Service Vulnerability

Description

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. 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. The update addresses the vulnerability by modifying how Windows NAT accesses the host.

7.7

CVSS

Severity: High

CVSS 3.1 •

CVSS 2.0 •

EPSS 2.62% Top 20%

Vendor Advisory microsoft.com

Affected: Microsoft Windows 10 Version 1607

Affected: Microsoft Windows Server 2016

Affected: Microsoft Windows Server 2016 (Server Core installation)

References

Link	Tags
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-16894	patch vendor advisory

Frequently Asked Questions

What is the severity of CVE-2020-16894?: CVE-2020-16894 has been scored as a high severity vulnerability.
How to fix CVE-2020-16894?: To fix CVE-2020-16894, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2020-16894 being actively exploited in the wild?: It is possible that CVE-2020-16894 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~3% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2020-16894?: CVE-2020-16894 affects Microsoft Windows 10 Version 1607, Microsoft Windows Server 2016, Microsoft Windows Server 2016 (Server Core installation).

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