CVE-2026-45588
Protection mechanism failure in Windows Secure Boot allows an authorized attacker to bypass a security feature locally.
CSIRTS triage
- What
- This vulnerability allows an unauthorized attacker to bypass a security feature locally due to a protection mechanism failure.
- Who is affected
- Users of Windows with Secure Boot enabled.
- Urgency
- Remediation is urgent due to the high severity of the bypass risk.
- Action
- Apply the latest security updates from Microsoft.
AI-assisted analysis generated from the source advisory — verify against the original.
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Exploitation outlook
- Low exploitation risk0.30% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 22% of all EPSS-scored CVEs.
Advisory coverage (1)
- highCVE-2026-45588: Secure Boot Security Feature Bypass Vulnerabilitymsrc · 2026-06-09
External references
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[](https://www.csirts.com/cve/CVE-2026-45588)