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CVE-2026-85321high7.5

Active Directory Federation Services (AD FS) Denial of Service Vulnerability

Impact

Allocation of resources without limits or throttling in Active Directory Federation Services (AD FS) allows an unauthorized attacker to deny service over a network.

Source excerpt · microsoft

Affected packages

This source has no supported package-version data for matching. You can read the advisory here, but this record alone cannot power a dependency check.

Affected products

Vendor version evidence. Product records are separate from automatic dependency matching.

Microsoft · Windows Server 2012 R2

Platforms: x64-based Systems

Version / rangeSource status
6.3.9600.0 to before 6.3.9600.23470affected
microsoft version evidence

Microsoft · Windows Server 2012 R2 (Server Core installation)

Platforms: x64-based Systems

Version / rangeSource status
6.3.9600.0 to before 6.3.9600.23470affected
microsoft version evidence

Microsoft · Windows Server 2016

Platforms: x64-based Systems

Version / rangeSource status
10.0.14393.0 to before 10.0.14393.9612affected
microsoft version evidence

Microsoft · Windows Server 2016 (Server Core installation)

Platforms: x64-based Systems

Version / rangeSource status
10.0.14393.0 to before 10.0.14393.9612affected
microsoft version evidence

Microsoft · Windows Server 2019

Platforms: x64-based Systems

Version / rangeSource status
10.0.17763.0 to before 10.0.17763.9376affected
microsoft version evidence

Microsoft · Windows Server 2019 (Server Core installation)

Platforms: x64-based Systems

Version / rangeSource status
10.0.17763.0 to before 10.0.17763.9376affected
microsoft version evidence

Microsoft · Windows Server 2022

Platforms: x64-based Systems

Version / rangeSource status
10.0.20348.0 to before 10.0.20348.5761affected
microsoft version evidence

Microsoft · Windows Server 2025

Platforms: x64-based Systems

Version / rangeSource status
10.0.26100.0 to before 10.0.26100.33650affected
microsoft version evidence

Microsoft · Windows Server 2025 (Server Core installation)

Platforms: x64-based Systems

Version / rangeSource status
10.0.26100.0 to before 10.0.26100.33650affected
microsoft version evidence

Original source description

Allocation of resources without limits or throttling in Active Directory Federation Services (AD FS) allows an unauthorized attacker to deny service over a network.

References