CVE-2021-27063

HIGH

Windows Server 2008, 2012, 2016, 2019 - Denial of Service in DNS Server

Title source: llm

Windows DNS Server Denial of Service Vulnerability

Core 1

Core References

Patch, Vendor Advisory x_refsource_misc

CVSS v3 7.5

EPSS 0.0574

EPSS Percentile 92.3%

Attack Vector NETWORK

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

Vulnrichment

Exploitation none

Automatable yes

Technical Impact partial

Status published

Products (9)

microsoft/windows_server_2008 r2 sp1

microsoft/windows_server_2008 sp2 (2 CPE variants)

microsoft/windows_server_2012

microsoft/windows_server_2012 r2

microsoft/windows_server_2016

microsoft/windows_server_2016 20h2

microsoft/windows_server_2016 1909

microsoft/windows_server_2016 2004

microsoft/windows_server_2019

Published Mar 11, 2021

Tracked Since Feb 18, 2026