NTLM hash disclosure via crafted library file
Published Mar 11, 2025 · Updated Feb 13, 2026
NTLM spoofing in Microsoft Windows allows remote attackers to disclose a user's NTLMv2 hash through a crafted .library-ms file. Windows Explorer resolves an attacker-controlled UNC location in the file and automatically initiates SMB authentication to that server. Delivery and minimal file interaction are required; the result is credential-material exposure without direct data modification or service interruption.
Summary
What happened
NTLM spoofing in Microsoft Windows allows remote attackers to disclose a user's NTLMv2 hash through a crafted .library-ms file. Windows Explorer resolves an attacker-controlled UNC location in the file and automatically initiates SMB authentication to that server. Delivery and minimal file interaction are required; the result is credential-material exposure without direct data modification or service interruption.
The record
- CVE
- CVE-2025-24054
- Published
- Mar 11, 2025
- Updated
- Feb 13, 2026
- Vendor
- Microsoft
- Product
- Windows 10 Version 1507
- Classifications
- CWE-73, T1187
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Mar 11, 2025CVE publishedPublication date reported by the CVE source.
- Feb 13, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=10.0.10240.0 <10.0.10240.20947
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Public exploit references
- Windows 10.0.17763.7009 Spoofing PoCproof of concept · unverified
- Windows 10/11 NTLM Hash Disclosure Spoofing PoCproof of concept · unverified
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Reported exploitation
- CISA Known Exploited Vulnerabilities catalog listingknown exploited catalog
- Malicious .library-ms phishing campaignsreported exploitation
Technologies
Your stack
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Your stack
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