Secure Boot bypass via integer underflow
Published Jul 9, 2024 · Updated Feb 10, 2026
Secure Boot bypass in affected Microsoft Windows builds allows physically proximate attackers to load untrusted boot software. Microsoft identifies an integer underflow but has not published the affected code locus, input field, or faulty arithmetic operation. Exploitation requires adjacent access and user interaction, and successful bypass defeats boot-time trust for attacker-controlled code.
Summary
What happened
Secure Boot bypass in affected Microsoft Windows builds allows physically proximate attackers to load untrusted boot software. Microsoft identifies an integer underflow but has not published the affected code locus, input field, or faulty arithmetic operation. Exploitation requires adjacent access and user interaction, and successful bypass defeats boot-time trust for attacker-controlled code.
The record
- CVE
- CVE-2024-37975
- 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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