CVE-2025-21225

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

Severity Score

5.9

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

Track

*SSVC

Descriptions

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

*Credits: N/A

CVSS Scores

Attack Vector

Network

Attack Complexity

High

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Attack Vector

Network

Attack Complexity

High

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Attack Vector

Network

Attack Complexity

High

Authentication

None

Confidentiality

None

Integrity

None

Availability

Complete

* Common Vulnerability Scoring System

SSVC

Decision:Track

Exploitation

None

Automatable

Tech. Impact

Partial

* Organization's Worst-case Scenario

Timeline

2024-12-10 CVE Reserved
2025-01-14 CVE Published
2025-01-15 EPSS Updated
2025-01-17 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

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

CAPEC

References (1)

URL	Tag	Source

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-21225	2025-01-14

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Microsoft Search vendor "Microsoft"		Windows Server 2019 Search vendor "Microsoft" for product "Windows Server 2019"				>= 10.0.17763.0 < 10.0.17763.6775 Search vendor "Microsoft" for product "Windows Server 2019" and version " >= 10.0.17763.0 < 10.0.17763.6775"		en		Affected
Microsoft Search vendor "Microsoft"		Windows Server 2019 (Server Core Installation) Search vendor "Microsoft" for product "Windows Server 2019 (Server Core Installation)"				>= 10.0.17763.0 < 10.0.17763.6775 Search vendor "Microsoft" for product "Windows Server 2019 (Server Core Installation)" and version " >= 10.0.17763.0 < 10.0.17763.6775"		en		Affected
Microsoft Search vendor "Microsoft"		Windows Server 2022 Search vendor "Microsoft" for product "Windows Server 2022"				>= 10.0.20348.0 < 10.0.20348.3091 Search vendor "Microsoft" for product "Windows Server 2022" and version " >= 10.0.20348.0 < 10.0.20348.3091"		en		Affected
Microsoft Search vendor "Microsoft"		Windows Server 2025 (Server Core Installation) Search vendor "Microsoft" for product "Windows Server 2025 (Server Core Installation)"				>= 10.0.26100.0 < 10.0.26100.2894 Search vendor "Microsoft" for product "Windows Server 2025 (Server Core Installation)" and version " >= 10.0.26100.0 < 10.0.26100.2894"		en		Affected
Microsoft Search vendor "Microsoft"		Windows Server 2022, 23H2 Edition (Server Core Installation) Search vendor "Microsoft" for product "Windows Server 2022, 23H2 Edition (Server Core Installation)"				>= 10.0.25398.0 < 10.0.25398.1369 Search vendor "Microsoft" for product "Windows Server 2022, 23H2 Edition (Server Core Installation)" and version " >= 10.0.25398.0 < 10.0.25398.1369"		en		Affected
Microsoft Search vendor "Microsoft"		Windows Server 2025 Search vendor "Microsoft" for product "Windows Server 2025"				>= 10.0.26100.0 < 10.0.26100.2894 Search vendor "Microsoft" for product "Windows Server 2025" and version " >= 10.0.26100.0 < 10.0.26100.2894"		en		Affected
Microsoft Search vendor "Microsoft"		Windows Server 2016 Search vendor "Microsoft" for product "Windows Server 2016"				>= 10.0.14393.0 < 10.0.14393.7699 Search vendor "Microsoft" for product "Windows Server 2016" and version " >= 10.0.14393.0 < 10.0.14393.7699"		en		Affected
Microsoft Search vendor "Microsoft"		Windows Server 2016 (Server Core Installation) Search vendor "Microsoft" for product "Windows Server 2016 (Server Core Installation)"				>= 10.0.14393.0 < 10.0.14393.7699 Search vendor "Microsoft" for product "Windows Server 2016 (Server Core Installation)" and version " >= 10.0.14393.0 < 10.0.14393.7699"		en		Affected