Secure Boot bypass via undisclosed integer underflow
Published Jul 9, 2024 · Updated Feb 10, 2026
Secure Boot bypass in affected Microsoft Windows releases allows attackers to compromise boot integrity via an adjacent attack. Microsoft has not published the affected component or how the CWE-191 integer underflow causes Secure Boot to accept untrusted code. Exploitation requires user interaction; successful bypass can expose, alter, or interrupt the system before Windows security controls load.
Summary
What happened
Secure Boot bypass in affected Microsoft Windows releases allows attackers to compromise boot integrity via an adjacent attack. Microsoft has not published the affected component or how the CWE-191 integer underflow causes Secure Boot to accept untrusted code. Exploitation requires user interaction; successful bypass can expose, alter, or interrupt the system before Windows security controls load.
The record
- CVE
- CVE-2024-37986
- Published
- Jul 9, 2024
- Updated
- Feb 10, 2026
- Vendor
- Microsoft
- Product
- Windows 10 Version 1507
- Classifications
- CWE-191, T1542.003
- Attack vector
- adjacent
- Privileges
- unauthenticated
Timeline
How it unfolded
- Jul 9, 2024CVE publishedPublication date reported by the CVE source.
- Feb 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 <10.0.10240.20710
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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