CVE-2025-21225

Windows Remote Desktop Gateway (RD Gateway) Denial of Service Vulnerability

Description

Windows Remote Desktop Gateway (RD Gateway) Denial of Service Vulnerability

References

Link	Tags
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-21225	patch vendor advisory

Frequently Asked Questions

What is the severity of CVE-2025-21225?: CVE-2025-21225 has been scored as a medium severity vulnerability.
How to fix CVE-2025-21225?: To fix CVE-2025-21225, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2025-21225 being actively exploited in the wild?: As for now, there are no information to confirm that CVE-2025-21225 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2025-21225?: CVE-2025-21225 affects Microsoft Windows Server 2019, Microsoft Windows Server 2019 (Server Core installation), Microsoft Windows Server 2022, Microsoft Windows Server 2025 (Server Core installation), Microsoft Windows Server 2022, 23H2 Edition (Server Core installation), Microsoft Windows Server 2025, Microsoft Windows Server 2016, Microsoft Windows Server 2016 (Server Core installation).

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Description

Category

CWE-843 – Access of Resource Using Incompatible Type ('Type Confusion')

References

Frequently Asked Questions