CVE-2025-21193
vulnerability analysis and mitigation

Overview

CVE-2025-21193 is an Active Directory Federation Server Spoofing Vulnerability that was identified and recorded on December 5, 2024. The vulnerability affects various versions of Microsoft Windows Server, including Windows Server 2016, 2019, 2022, and 2025 (CVE Mitre).

Technical details

The vulnerability has been assigned a CVSS severity score of 7.0, with the vector string AV:N/AC:M/Au:N/C:C/I:N/A:N, indicating a network-exploitable vulnerability with medium attack complexity, requiring no authentication, and potentially resulting in complete confidentiality compromise (Rapid7).

Impact

This vulnerability could potentially lead to complete confidentiality compromise in affected Active Directory Federation Server systems, though integrity and availability are not impacted according to the CVSS metrics (Rapid7).

Mitigation and workarounds

Microsoft has released security updates to address this vulnerability through various KB patches including KB5049983, KB5049984, KB5049993, KB5050008, and KB5050009 for different versions of Windows Server (Rapid7).

Additional resources


SourceThis report was generated using AI

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