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Vulnerability · Published Mar 11, 2021 · Assigned by microsoft

CVE-2021-26896Windows DNS Server Denial of Service Vulnerability

High 7.5

In plain English

A high-severity security flaw in Windows Server 2008 R2 Service Pack 1 from Microsoft. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 7.8% (higher than 95% of all known vulnerabilities).

Severity (CVSS 3.1)7.5High
Exploit odds (30 days)7.8%top 5.3% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known

Official description

Windows DNS Server Denial of Service Vulnerability

Affected products (as reported)

VendorProductVersions
Microsoft Windows Server 2008 R2 Service Pack 1 6.1.7601.0 – before 6.1.7601.24566
Microsoft Windows Server 2008 R2 Service Pack 1 (Server Core installation) 6.1.7601.0 – before 6.1.7601.24566
Microsoft Windows Server 2008 Service Pack 2 6.0.6003.0 – before 6.0.6003.21070
Microsoft Windows Server 2008 Service Pack 2 (Server Core installation) 6.0.6003.0 – before 6.0.6003.21070
Microsoft Windows Server 2012 6.2.9200.0 – before 6.2.9200.23298
Microsoft Windows Server 2012 (Server Core installation) 6.2.9200.0 – before 6.2.9200.23298
Microsoft Windows Server 2012 R2 6.3.9600.0 – before 6.3.9600.19968
Microsoft Windows Server 2012 R2 (Server Core installation) 6.3.9600.0 – before 6.3.9600.19968
Microsoft Windows Server 2016 10.0.14393.0 – before 10.0.14393.4283
Microsoft Windows Server 2016 (Server Core installation) 10.0.14393.0 – before 10.0.14393.4283
Microsoft Windows Server 2019 10.0.17763.0 – before 10.0.17763.1817
Microsoft Windows Server 2019 (Server Core installation) 10.0.17763.0 – before 10.0.17763.1817
Microsoft Windows Server version 2004 10.0.0 – before 10.0.19043.867
Microsoft Windows Server version 20H2 10.0.0 – before 10.0.19043.867
Microsoft Windows Server, version 1909 (Server Core installation) 10.0.0 – before 10.0.18363.1440

References