CVE-2022-34724: Windows DNS Server Denial of Service Vulnerability

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 3.7% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2022-09-13 · updated 2026-06-17

Description

Windows DNS Server Denial of Service Vulnerability

Affected products

Microsoft Windows Server 2008: r2-sp1
Microsoft Windows Server 2012: r2
Microsoft Windows Server 2016: all versions
Microsoft Windows Server 2019: all versions
Microsoft Windows Server 2022: all versions
Microsoft Windows Server 2008 R2 Service Pack 1: from 6.1.7601.0 before 6.1.7601.26115 — fixed in 6.1.7601.26115
Microsoft Windows Server 2008 Service Pack 2: from 6.0.6003.0 before 6.0.6003.21666 — fixed in 6.0.6003.21666
Microsoft Windows Server 2012: from 6.2.9200.0 before 6.2.9200.23865 — fixed in 6.2.9200.23865
Microsoft Windows Server 2012 R2: from 6.3.9600.0 before 6.3.9600.20571 — fixed in 6.3.9600.20571
Microsoft Windows Server 2016: from 10.0.14393.0 before 10.0.14393.5356 — fixed in 10.0.14393.5356
Microsoft Windows Server 2019: from 10.0.17763.0 before 10.0.17763.3406 — fixed in 10.0.17763.3406
Microsoft Windows Server 2022: from 10.0.20348.0 before 10.0.20348.1006 — fixed in 10.0.20348.1006

How to fix

Upgrade to a fixed version: Microsoft Windows Server 2008 R2 Service Pack 1 6.1.7601.26115; Microsoft Windows Server 2008 Service Pack 2 6.0.6003.21666; Microsoft Windows Server 2012 6.2.9200.23865; Microsoft Windows Server 2012 R2 6.3.9600.20571; Microsoft Windows Server 2016 10.0.14393.5356; Microsoft Windows Server 2019 10.0.17763.3406; Microsoft Windows Server 2022 10.0.20348.1006. Check the vendor advisory for mitigations.

References

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