CVE-2026-108131

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Spoofing Vulnerability in Active Directory Federation Services

Publication date: 2026-10-13

Last updated on: 2026-10-16

Assigner: Microsoft Corporation

Description

No cwe for this issue in Active Directory Federation Services (AD FS) allows an unauthorized attacker to perform spoofing over a network.

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Meta Information

Published

2026-10-13

Last Modified

2026-10-16

Generated

2026-11-08

AI Q&A

2026-10-14

EPSS Evaluated

2026-11-07

NVD

CVE-2026-108131

EUVD

EUVD-2026-100450

Affected Vendors & Products

Vendor	Product	Version / Range
Microsoft	Windows 10 Version 1607	10.0.14393.0
Microsoft	Windows 10 Version 1809	10.0.17763.0
Microsoft	Windows 10 Version 21H2	10.0.19044.0
Microsoft	Windows 10 Version 22H2	10.0.19045.0
Microsoft	Windows 11 version 23H2	10.0.22631.0
Microsoft	Windows 11 Version 23H2	10.0.22631.0
Microsoft	Windows 11 Version 24H2	10.0.26100.0
Microsoft	Windows 11 Version 25H2	10.0.26200.0
Microsoft	Windows 11 version 26H1	10.0.28000.0
Microsoft	Windows 11 Version 26H2	10.0.26300.0
Microsoft	Windows Server 2012	6.2.9200.0
Microsoft	Windows Server 2012 (Server Core installation)	6.2.9200.0
Microsoft	Windows Server 2012 R2	6.3.9600.0
Microsoft	Windows Server 2012 R2 (Server Core installation)	6.3.9600.0
Microsoft	Windows Server 2016	10.0.14393.0
Microsoft	Windows Server 2016 (Server Core installation)	10.0.14393.0
Microsoft	Windows Server 2019	10.0.17763.0
Microsoft	Windows Server 2019 (Server Core installation)	10.0.17763.0
Microsoft	Windows Server 2022	10.0.20348.0
Microsoft	Windows Server 2025	10.0.26100.0
Microsoft	Windows Server 2025 (Server Core installation)	10.0.26100.0

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-295	The product does not validate, or incorrectly validates, a certificate.
CWE-290	This attack-focused weakness is caused by incorrectly implemented authentication schemes that are subject to spoofing attacks.

Attack-Flow Graph

Executive Summary

This vulnerability in Active Directory Federation Services (AD FS) allows an unauthorized attacker to perform spoofing over a network. Spoofing involves impersonating a legitimate user or system to gain unauthorized access or perform malicious actions.

Detection Guidance

Detection methods for this AD FS spoofing vulnerability are not specified in the provided CVE details. Microsoft's official guidance should be consulted for detection steps and commands.

Impact Analysis

An attacker could exploit this to impersonate users or systems, potentially gaining unauthorized access to sensitive data or resources. This could lead to data breaches, unauthorized transactions, or further network compromise.

Compliance Impact

This vulnerability could lead to unauthorized access or data breaches, violating compliance requirements for GDPR, HIPAA, and other regulations. Non-compliance may result in legal penalties, fines, or reputational damage.

Mitigation Strategies

Apply the latest security updates from Microsoft for AD FS and related components. Monitor Microsoft's security advisories for patches and follow their recommended mitigation steps.

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