Local security bypass via unverified enclave data
Published Apr 8, 2025 · Updated Aug 10, 2026
Insufficient authenticity verification in Microsoft Windows VBS Enclave allows local high-privileged users to bypass security controls. Microsoft has not disclosed the affected function or data format, stating only that VBS Enclave fails to verify data authenticity. Successful exploitation requires local high privileges and permits confidentiality and integrity compromise without service interruption.
Summary
What happened
Insufficient authenticity verification in Microsoft Windows VBS Enclave allows local high-privileged users to bypass security controls. Microsoft has not disclosed the affected function or data format, stating only that VBS Enclave fails to verify data authenticity. Successful exploitation requires local high privileges and permits confidentiality and integrity compromise without service interruption.
The record
- CVE
- CVE-2025-27735
- Published
- Apr 8, 2025
- Updated
- Aug 10, 2026
- Vendor
- Microsoft
- Product
- Windows 10 Version 1507
- Classifications
- CWE-345
- Attack vector
- local
- Privileges
- admin
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?
Compare these published version ranges with your installed build and any vendor patches.
- 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.
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
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Your stack
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