CVE-2025-21217: CWE-693: Protection Mechanism Failure in Microsoft Windows 10 Version 1507
Windows NTLM Spoofing Vulnerability
AI Analysis
Technical Summary
CVE-2025-21217 is a protection mechanism failure (CWE-693) in Windows 10 Version 1507 (build 10.0.10240.0) that enables NTLM spoofing attacks. The vulnerability has a CVSS 3.1 base score of 6.5, indicating a medium severity with network attack vector, low attack complexity, no privileges required, user interaction required, and impact limited to confidentiality. Microsoft has published an official fix for this vulnerability as indicated in their security advisory.
Potential Impact
Successful exploitation of this vulnerability could allow an attacker to spoof NTLM authentication, leading to unauthorized disclosure of information (confidentiality impact). There is no impact on integrity or availability. No known exploits are currently reported in the wild.
Mitigation Recommendations
An official fix is available from Microsoft. Users and administrators should apply the security update provided in the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-21217 to remediate this vulnerability.
CVE-2025-21217: CWE-693: Protection Mechanism Failure in Microsoft Windows 10 Version 1507
Description
Windows NTLM Spoofing Vulnerability
CVSS v3.1
Score 6.5medium
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2025-21217 is a protection mechanism failure (CWE-693) in Windows 10 Version 1507 (build 10.0.10240.0) that enables NTLM spoofing attacks. The vulnerability has a CVSS 3.1 base score of 6.5, indicating a medium severity with network attack vector, low attack complexity, no privileges required, user interaction required, and impact limited to confidentiality. Microsoft has published an official fix for this vulnerability as indicated in their security advisory.
Potential Impact
Successful exploitation of this vulnerability could allow an attacker to spoof NTLM authentication, leading to unauthorized disclosure of information (confidentiality impact). There is no impact on integrity or availability. No known exploits are currently reported in the wild.
Mitigation Recommendations
An official fix is available from Microsoft. Users and administrators should apply the security update provided in the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-21217 to remediate this vulnerability.
Technical Details
- Data Version
- 5.1
- Assigner Short Name
- microsoft
- Date Reserved
- 2024-12-05T21:43:30.771Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-21217","vendor":"Microsoft"}]
Threat ID: 68c0bd4d9ed239a66badea74
Added to database: 09/09/2025, 23:50:37 UTC
Last enriched: 06/10/2026, 09:42:42 UTC
Last updated: 09/10/2026, 19:36:49 UTC
Views: 103
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