CVE-2026-45654
Secure Boot Security Feature Bypass Vulnerability
No known exploitation. EPSS puts it in the 24th percentile. Fixed versions are out.
No public exploit knownFix2 products4 fixed builds listed below
e.g. OID 1.3.6.1.4.1.25623.1.3.0.12390.0.5094126.494846484650544948484656545353
What to do
Find your product and version, then upgrade to the build on the right.
- Microsoft Windows 11 Version 24H2Affected: ≥ 10.0.26100.0, < 10.0.26100.8655Upgrade to: 10.0.26100.8655Affected: ≥ 10.0.26200.0, < 10.0.26200.8655Upgrade to: 10.0.26200.8655Affected: ≥ 10.0.28000.0, < 10.0.28000.2269Upgrade to: 10.0.28000.2269Stated by: CVE record
- Microsoft Windows Server 2025Affected: ≥ 10.0.26100.0, < 10.0.26100.32995Upgrade to: 10.0.26100.32995Stated by: CVE record
Versions as the sources state them. Full version matrix after sign-in
What it is
From the CVE record
Improper access control in Windows Secure Boot allows an authorized attacker to bypass a security feature locally.
In plain language
No plain-language summary for this CVE yet.
Exploitation
Where each signal puts this CVE on the scale from published to confirmed exploited.
- CISA KEV
Not in the catalog. CISA has not confirmed exploitation.
- Public exploits
No public exploit or proof of concept found in the sources we track.
- EPSS
0.3% chance of exploitation activity in the next 30 days, which ranks it in the 24th percentile of scored CVEs.
Exploit Prediction Scoring System, FIRST.org. A probability, not a confirmation.
Lifecycle
9 events over 44 days, from the signal feeds we watch.
- Patch availablerecord updated
- Patch availablerecord updated
- OpenVAS check added
- Patch availablerecord updated
- Publishedweakness classified
Affected products
Technical detail
CVSS 3.1 vector
Open in the CVSS calculatorCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:N
Scored 7.9 by NVD.
How it is reached
- Attack Vector LocalRequires local access to the vulnerable system (e.g. local login, malicious file)
- Attack Complexity LowNo special conditions — the attack can be reliably reproduced
- Privileges Required HighRequires admin or elevated privileges
- User Interaction NoneNo user interaction needed — fully automated exploitation
Scope
- Scope ChangedThe exploit can affect other components (e.g. sandbox escape, host compromise from VM)
Impact if exploited
- Confidentiality HighTotal information disclosure — all data in the component is compromised
- Integrity HighTotal loss of integrity — attacker can modify any data in the component
- Availability NoneNo availability impact
Weaknesses
Sources
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