CVE-2026-45654

CVE-2026-45654

Protection mechanism failure in Windows Secure Boot allows an authorized attacker to bypass a security feature locally.

CVSS v3 metric

CVSS v3 base score 7.9 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:N.

Weakness classification (CWE)

CWE-284 — Improper Access Control

References

secure@microsoft.com

Frequently asked questions

What is CVE-2026-45654?: CVE-2026-45654 is a high-severity vulnerability, classified under Improper Access Control. CVSS score: 7.9/10. Published 2026-06-09.
How severe is CVE-2026-45654?: High severity. CVSS v3 base score is 7.9 out of 10.