Privilege escalation via improper storage link resolution
Published Feb 11, 2025 · Updated Feb 26, 2026
Improper link resolution in Microsoft Windows Storage allows local users to elevate privileges by directing file access through a crafted link. The affected storage operation follows an attacker-controlled link before accessing the file, resolving the request to an unintended resource; Microsoft has not disclosed the responsible function or file path. A low-privileged local account is required, and successful exploitation can modify protected data and interrupt service on the affected host.
Summary
What happened
Improper link resolution in Microsoft Windows Storage allows local users to elevate privileges by directing file access through a crafted link. The affected storage operation follows an attacker-controlled link before accessing the file, resolving the request to an unintended resource; Microsoft has not disclosed the responsible function or file path. A low-privileged local account is required, and successful exploitation can modify protected data and interrupt service on the affected host.
The record
- CVE
- CVE-2025-21391
- Published
- Feb 11, 2025
- Updated
- Feb 26, 2026
- Vendor
- Microsoft
- Product
- Windows 10 Version 1507
- Classifications
- CWE-59, T1068
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Feb 11, 2025CVE publishedPublication date reported by the CVE source.
- Feb 26, 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?
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- Affected versionversion=10.0.10240.0 <10.0.10240.20915
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
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Weakness, pattern, technique
Public exploit references
No public exploit references are available in this record.
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Reported exploitation
- CISA Known Exploited Vulnerabilities Catalog entryknown exploited catalog
Technologies
Your stack
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Your stack
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