CVE-2023-32020: Windows DNS Spoofing Vulnerability

Severity: medium (CVSS 5.6 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.7% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2023-06-13 · updated 2026-06-17
Weakness: CWE-350

Description

Windows DNS Spoofing 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 6.1.7601.26564 — fixed in 6.1.7601.26564
Microsoft Windows Server 2008 Service Pack 2: from 6.0.6003.0 before 6.0.6003.22113 — fixed in 6.0.6003.22113
Microsoft Windows Server 2012: from 6.2.9200.0 before 6.2.9200.24314 — fixed in 6.2.9200.24314
Microsoft Windows Server 2012 R2: from 6.3.9600.0 before 6.3.9600.21013 — fixed in 6.3.9600.21013
Microsoft Windows Server 2016: from 10.0.14393.0 before 10.0.14393.5989 — fixed in 10.0.14393.5989
Microsoft Windows Server 2019: from 10.0.17763.0 before 10.0.17763.4499 — fixed in 10.0.17763.4499
Microsoft Windows Server 2022: from 10.0.20348.0 before 10.0.20348.1787 — fixed in 10.0.20348.1787

How to fix

Upgrade to a fixed version: Microsoft Windows Server 2008 R2 Service Pack 1 6.1.7601.26564; Microsoft Windows Server 2008 Service Pack 2 6.0.6003.22113; Microsoft Windows Server 2012 6.2.9200.24314; Microsoft Windows Server 2012 R2 6.3.9600.21013; Microsoft Windows Server 2016 10.0.14393.5989; Microsoft Windows Server 2019 10.0.17763.4499; Microsoft Windows Server 2022 10.0.20348.1787. Check the vendor advisory for mitigations.

References

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