CVE-2025-29968: Active Directory Certificate Services (AD CS) Denial of Service Vulnerability

Severity: medium (CVSS 6.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 2.0% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2025-05-13 · updated 2026-06-17
Weakness: CWE-20

Description

Improper input validation in Active Directory Certificate Services (AD CS) allows an authorized attacker to deny service over a network.

Affected products

Microsoft Windows Server 2008: r2-sp1
Microsoft Windows Server 2012: r2
Microsoft Windows Server 2016: before 10.0.14393.8066 — fixed in 10.0.14393.8066
Microsoft Windows Server 2019: before 10.0.17763.7314 — fixed in 10.0.17763.7314
Microsoft Windows Server 2022: before 10.0.20348.3692 — fixed in 10.0.20348.3692
Microsoft Windows Server 2022, 23H2 Edition (Server Core installation): before 10.0.25398.1611 — fixed in 10.0.25398.1611
Microsoft Windows Server 2008 R2 Service Pack 1: from 6.1.7601.0 before 6.1.7601.27729 — fixed in 6.1.7601.27729
Microsoft Windows Server 2008 Service Pack 2: from 6.0.6003.0 before 6.0.6003.23279 — fixed in 6.0.6003.23279
Microsoft Windows Server 2012: from 6.2.9200.0 before 6.2.9200.25475 — fixed in 6.2.9200.25475
Microsoft Windows Server 2012 R2: from 6.3.9600.0 before 6.3.9600.22577 — fixed in 6.3.9600.22577
Microsoft Windows Server 2016: from 10.0.14393.0 before 10.0.14393.8066 — fixed in 10.0.14393.8066
Microsoft Windows Server 2019: from 10.0.17763.0 before 10.0.17763.7314 — fixed in 10.0.17763.7314
Microsoft Windows Server 2022: from 10.0.20348.0 before 10.0.20348.3692 — fixed in 10.0.20348.3692
Microsoft Windows Server 2022, 23H2 Edition (Server Core installation): from 10.0.25398.0 before 10.0.25398.1611 — fixed in 10.0.25398.1611

How to fix

Upgrade to a fixed version: Microsoft Windows Server 2016 10.0.14393.8066; Microsoft Windows Server 2019 10.0.17763.7314; Microsoft Windows Server 2022 10.0.20348.3692; Microsoft Windows Server 2022, 23H2 Edition (Server Core installation) 10.0.25398.1611; Microsoft Windows Server 2008 R2 Service Pack 1 6.1.7601.27729; Microsoft Windows Server 2008 Service Pack 2 6.0.6003.23279; Microsoft Windows Server 2012 6.2.9200.25475; Microsoft Windows Server 2012 R2 6.3.9600.22577; Microsoft Windows Server 2016 10.0.14393.8066; Microsoft Windows Server 2019 10.0.17763.7314; Microsoft Windows Server 2022 10.0.20348.3692; Microsoft Windows Server 2022, 23H2 Edition (Server Core installation) 10.0.25398.1611. Check the vendor advisory for mitigations.

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-29968

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