CVE-2025-21225
vulnerability analysis and mitigation

Overview

Windows Remote Desktop Gateway (RD Gateway) Denial of Service Vulnerability, identified as CVE-2025-21225, was discovered and recorded on December 10, 2024. This vulnerability affects various versions of Windows Server, including Server 2016, 2019, 2022, and 2025 (CVE MITRE).

Technical details

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

Impact

This vulnerability specifically affects the availability of Windows Remote Desktop Gateway services, potentially allowing attackers to cause denial of service conditions in affected systems (CVE MITRE).

Mitigation and workarounds

Microsoft has released security updates to address this vulnerability through various KB patches including KB5049993 for Windows Server 2016, KB5050008 for Server 2019, KB5049983/KB5049984 for Server 2022 versions, and KB5050009 for Server 2025 (Rapid7).

Additional resources


SourceThis report was generated using AI

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