Windows Server 2016
CVE-2025-21225
MEDIUM
Severity by source
AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Primary rating from NVD · only source for this CVE.
CVSS VectorNVD
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Lifecycle Timeline
3DescriptionCVE.org
Windows Remote Desktop Gateway (RD Gateway) Denial of Service Vulnerability
AnalysisAI
Windows Remote Desktop Gateway (RD Gateway) Denial of Service Vulnerability. Rated medium severity (CVSS 5.9), this vulnerability is remotely exploitable, no authentication required. This Access of Resource Using Incompatible Type (Type Confusion) vulnerability could allow attackers to execute arbitrary code by exploiting type confusion in the application.
Technical ContextAI
This vulnerability is classified as Access of Resource Using Incompatible Type (Type Confusion) (CWE-843), which allows attackers to execute arbitrary code by exploiting type confusion in the application. Windows Remote Desktop Gateway (RD Gateway) Denial of Service Vulnerability Affected products include: Microsoft Windows Server 2016, Microsoft Windows Server 2019, Microsoft Windows Server 2022, Microsoft Windows Server 2022 23H2, Microsoft Windows Server 2025.
RemediationAI
A vendor patch is available. Apply the latest security update as soon as possible. Enforce strict type checking, use type-safe languages, validate object types before operations.
More in Windows Server 2016
View allWindows Internet Shortcut Files (.url) contain an external control vulnerability (CVE-2025-33053, CVSS 8.8) that enables
Windows SMB contains an improper access control vulnerability (CVE-2025-33073, CVSS 8.8) enabling authenticated attacker
Active Directory Domain Services contains an elevation of privilege vulnerability that allows authenticated domain users
Windows graphics on Microsoft Windows Server 2008 SP2 and R2 SP1, Windows 7 SP1, Windows 8.1, Windows Server 2012 Gold a
Microsoft Scripting Engine contains a type confusion vulnerability allowing unauthorized remote code execution over the
gdi32.dll in Graphics Device Interface (GDI) in Microsoft Windows Vista SP2, Windows Server 2008 SP2 and R2 SP1, Windows
Uniscribe in Windows Server 2008 SP2 and R2 SP1, Windows 7 SP1, Windows 8.1, Windows Server 2012 Gold and R2, Windows RT
Windows 7 SP1, Windows 8.1 and RT 8.1, Windows Server 2008 SP2 and R2 SP1, Windows Server 2012 and R2, Windows 10 Gold,
Local Security Authority Subsystem Service (LSASS) in Microsoft Windows Vista SP2, Windows Server 2008 SP2 and R2 SP1, W
The Microsoft Windows Search component on Microsoft Windows Server 2008 SP2 and R2 SP1, Windows 7 SP1, Windows 8.1, Wind
Local privilege escalation in Microsoft Active Directory Federation Services (AD FS) lets an already-authenticated low-p
Windows CLFS Driver contains an input validation flaw enabling local privilege escalation, yet another CLFS kernel vulne
Same technique Memory Corruption
View allShare
External POC / Exploit Code
Leaving vuln.today