CVE-2026-45588: Secure Boot Security Feature Bypass Vulnerability
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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Details
Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-45588
Exploitation outlook
EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.
- Low exploitation riskCVE-2026-455880.30% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 22% of all scored CVEs.
Referenced CVEs
| CVE | CSIRTS overview | External |
|---|---|---|
| CVE-2026-45588 | coverage & exploitation status | NVD · CVE.org |
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