Local Secure Boot security-feature bypass
Published Jul 14, 2026 · Updated Jul 14, 2026
Security check bypass in Microsoft Windows Secure Boot allows local users with low privileges to bypass a boot security feature. Microsoft has not disclosed the affected standard, the check's code locus, or the input that the implementation accepts incorrectly. Exploitation requires local low-privilege access and no user interaction; the published record does not detail the resulting post-bypass actions.
Summary
What happened
Security check bypass in Microsoft Windows Secure Boot allows local users with low privileges to bypass a boot security feature. Microsoft has not disclosed the affected standard, the check's code locus, or the input that the implementation accepts incorrectly. Exploitation requires local low-privilege access and no user interaction; the published record does not detail the resulting post-bypass actions.
The record
- CVE
- CVE-2026-49783
- Published
- Jul 14, 2026
- Updated
- Jul 14, 2026
- Vendor
- Microsoft
- Product
- Windows Server 2019
- Classifications
- CWE-358
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Jul 14, 2026CVE publishedPublication date reported by the CVE source.
- Jul 14, 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=10.0.17763.0 <10.0.17763.9020
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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