Secure Boot bypass via undisclosed integer overflow
Published Jul 9, 2024 · Updated Feb 10, 2026
Secure Boot bypass in affected Windows 10, Windows 11, and Windows Server 2022 builds allows local users to defeat pre-OS trust. Microsoft maps the flaw to integer overflow but has not disclosed the responsible component, arithmetic operation, or attacker-controlled value. Exploitation requires low privileges, an adjacent position, high-complexity conditions, and user interaction; successful exploitation compromises boot integrity and protected data.
Summary
What happened
Secure Boot bypass in affected Windows 10, Windows 11, and Windows Server 2022 builds allows local users to defeat pre-OS trust. Microsoft maps the flaw to integer overflow but has not disclosed the responsible component, arithmetic operation, or attacker-controlled value. Exploitation requires low privileges, an adjacent position, high-complexity conditions, and user interaction; successful exploitation compromises boot integrity and protected data.
The record
- CVE
- CVE-2024-26184
- Published
- Jul 9, 2024
- Updated
- Feb 10, 2026
- Vendor
- Microsoft
- Product
- Windows 11 version 21H2
- Classifications
- CWE-190, T1542.003
- Attack vector
- adjacent
- Privileges
- authenticated
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=10.0.0 <10.0.22000.3079
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.
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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