Local memory disclosure through out-of-bounds read
Published Jan 14, 2025 · Updated Jun 9, 2026
An out-of-bounds read in the Microsoft Windows CSC Service allows local users with low privileges to disclose process memory. Microsoft has not published the affected function, buffer operation, or attacker-controlled input that triggers the read. Exploitation requires local low-privilege access and exposes memory beyond the intended buffer without reported integrity or availability impact.
Summary
What happened
An out-of-bounds read in the Microsoft Windows CSC Service allows local users with low privileges to disclose process memory. Microsoft has not published the affected function, buffer operation, or attacker-controlled input that triggers the read. Exploitation requires local low-privilege access and exposes memory beyond the intended buffer without reported integrity or availability impact.
The record
- CVE
- CVE-2025-21374
- Published
- Jan 14, 2025
- Updated
- Jun 9, 2026
- Vendor
- Microsoft
- Product
- Windows 10 Version 1507
- Classifications
- CWE-125
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Jan 14, 2025CVE publishedPublication date reported by the CVE source.
- Jun 9, 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 <10.0.10240.20890
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.
Weakness, pattern, technique
Public exploit references
No public exploit references are available in this record.
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Technologies
Your stack
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Your stack
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