CVE-2021-26896

Windows DNS Server Denial of Service Vulnerability

State: Published
Severity: 7.5 High
Published: Mar 11, 2021
Updated: Aug 19, 2026
Reserved: Feb 8, 2021

Description

Windows DNS Server Denial of Service Vulnerability

Scores

CVSS	Score	Vector	Source
3.1	7.5 High	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C	microsoft

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
Windows Server 2008 R2 Service Pack 1Microsoft	6.1.7601.0 to before 6.1.7601.24566Affected
Windows Server 2008 R2 Service Pack 1 (Server Core installation)Microsoft	6.1.7601.0 to before 6.1.7601.24566Affected
Windows Server 2008 Service Pack 2Microsoft	6.0.6003.0 to before 6.0.6003.21070Affected
Windows Server 2008 Service Pack 2 (Server Core installation)Microsoft	6.0.6003.0 to before 6.0.6003.21070Affected
Windows Server 2012Microsoft	6.2.9200.0 to before 6.2.9200.23298Affected
Windows Server 2012 (Server Core installation)Microsoft	6.2.9200.0 to before 6.2.9200.23298Affected
Windows Server 2012 R2Microsoft	6.3.9600.0 to before 6.3.9600.19968Affected
Windows Server 2012 R2 (Server Core installation)Microsoft	6.3.9600.0 to before 6.3.9600.19968Affected
Windows Server 2016Microsoft	10.0.14393.0 to before 10.0.14393.4283Affected
Windows Server 2016 (Server Core installation)Microsoft	10.0.14393.0 to before 10.0.14393.4283Affected
Windows Server 2019Microsoft	10.0.17763.0 to before 10.0.17763.1817Affected
Windows Server 2019 (Server Core installation)Microsoft	10.0.17763.0 to before 10.0.17763.1817Affected
Windows Server version 2004Microsoft	10.0.0 to before 10.0.19043.867Affected
Windows Server version 20H2Microsoft	10.0.0 to before 10.0.19043.867Affected
Windows Server, version 1909 (Server Core installation)Microsoft	10.0.0 to before 10.0.18363.1440Affected

References

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