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MEDIUM · 6.5

CVE-2025-21217

Windows NTLM Spoofing Vulnerability

Vulnerability Description

Windows NTLM Spoofing Vulnerability

CVSS Score

6.5

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
NONE
Availability
NONE

Affected Products

VendorProductVersions
MicrosoftWindows 10 1507< 10.0.10240.20890
MicrosoftWindows 10 1607< 10.0.14393.7699
MicrosoftWindows 10 1809< 10.0.17763.6775
MicrosoftWindows 10 21H2< 10.0.19044.5371
MicrosoftWindows 10 22H2< 10.0.19045.5371
MicrosoftWindows 11 22H2< 10.0.22621.4751
MicrosoftWindows 11 23H2< 10.0.22631.4751
MicrosoftWindows 11 24H2< 10.0.26100.2894
MicrosoftWindows Server 2008-
MicrosoftWindows Server 2012-
MicrosoftWindows Server 2016< 10.0.14393.7699
MicrosoftWindows Server 2019< 10.0.17763.6775
MicrosoftWindows Server 2022< 10.0.20348.3091
MicrosoftWindows Server 2022 23H2< 10.0.25398.1369
MicrosoftWindows Server 2025< 10.0.26100.2894

Related Weaknesses (CWE)

CWE-693

References

FAQ

What is CVE-2025-21217?

CVE-2025-21217 is a vulnerability with a CVSS score of 6.5 (MEDIUM). Windows NTLM Spoofing Vulnerability

How severe is CVE-2025-21217?

CVE-2025-21217 has been rated MEDIUM with a CVSS base score of 6.5/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2025-21217?

Check the references section above for vendor advisories and patch information. Affected products include: Microsoft Windows 10 1507, Microsoft Windows 10 1607, Microsoft Windows 10 1809, Microsoft Windows 10 21H2, Microsoft Windows 10 22H2.