CVE-2020-16899

HighCVSS 7.5/10Last modified Jun 17, 2026

Description

<p>A denial of service vulnerability exists when the Windows TCP/IP stack improperly handles ICMPv6 Router Advertisement packets. An attacker who successfully exploited this vulnerability could cause a target system to stop responding.</p> <p>To exploit this vulnerability, an attacker would have to send specially crafted ICMPv6 Router Advertisement packets to a remote Windows computer. The vulnerability would not allow an attacker to execute code or to elevate user rights directly.</p> <p>The update addresses the vulnerability by correcting how the Windows TCP/IP stack handles ICMPv6 Router Advertisement packets.</p>

Metrics

CVSS 3.1 7.5/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected software

VendorProductVersions
MicrosoftWindows 10 Version 1803>= 10.0.0, < publication
MicrosoftWindows 10 Version 1809>= 10.0.0, < publication
MicrosoftWindows Server 2019>= 10.0.0, < publication
MicrosoftWindows Server 2019 (Server Core installation)>= 10.0.0, < publication
MicrosoftWindows 10 Version 1909>= 10.0.0, < publication
MicrosoftWindows Server, version 1909 (Server Core installation)>= 10.0.0, < publication
MicrosoftWindows 10 Version 1709 for 32-bit Systems>= 10.0.0, < publication
MicrosoftWindows 10 Version 1709>= 10.0.0, < publication
MicrosoftWindows 10 Version 1903 for 32-bit Systems>= 10.0.0, < publication
MicrosoftWindows 10 Version 1903 for x64-based Systems>= 10.0.0, < publication
MicrosoftWindows 10 Version 1903 for ARM64-based Systems>= 10.0.0, < publication
MicrosoftWindows Server, version 1903 (Server Core installation)>= 10.0.0, < publication
MicrosoftWindows 10 Version 2004>= 10.0.0, < publication
MicrosoftWindows Server version 2004>= 10.0.0, < publication

References

Timeline

Published
Oct 16, 2020
Last modified
Jun 17, 2026
NVD status
Modified

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CVE-2020-16899: High severity, CVSS 7.5 | Vulnix