Security feature bypass via improper input validation
Published Apr 8, 2025 · Updated Aug 10, 2026
Improper input validation in Microsoft Windows Security Zone Mapping allows local users to bypass security controls after user interaction. Microsoft has not disclosed which Security Zone Mapping input is mishandled or how its validation fails. Exploitation requires local access and user interaction; the resulting boundary bypass can compromise confidentiality, integrity, and availability.
Summary
What happened
Improper input validation in Microsoft Windows Security Zone Mapping allows local users to bypass security controls after user interaction. Microsoft has not disclosed which Security Zone Mapping input is mishandled or how its validation fails. Exploitation requires local access and user interaction; the resulting boundary bypass can compromise confidentiality, integrity, and availability.
The record
- CVE
- CVE-2025-27737
- Published
- Apr 8, 2025
- Updated
- Aug 10, 2026
- Vendor
- Microsoft
- Product
- Windows 10 Version 1507
- Classifications
- CWE-20
- Attack vector
- local
- Privileges
- unauthenticated
Timeline
How it unfolded
- Apr 8, 2025CVE publishedPublication date reported by the CVE source.
- Aug 10, 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 <10.0.10240.20978
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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