CVE-2026-45654

Name: CVE-2026-45654
Creator: NVD / NIST
Published: 2026-06-09T17:17:32.46+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.9/10EPSS 0.31%

Last modified Jun 17, 2026

CVE-2026-45654 is a high-severity vulnerability rated 7.9/10 on the CVSS scale. Protection mechanism failure in Windows Secure Boot allows an authorized attacker to bypass a security feature locally.. EPSS estimates a 0.31% chance of exploitation in the next 30 days.

Description

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

Metrics

CVSS 3.1

7.9/10

CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:N

EPSS Probability

0.31%

22.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-284

Affected Software

Vendor	Product	Versions
Microsoft	Windows 11 24h2	< 10.0.26100.8655
Microsoft	Windows 11 25h2	< 10.0.26200.8655
Microsoft	Windows 11 26h1	< 10.0.28000.2269
Microsoft	Windows Server 2025	< 10.0.26100.32995

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-45654Vendor Advisory

Timeline

Published: Jun 9, 2026
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2026-45654?

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

How severe is CVE-2026-45654?

CVE-2026-45654 has a CVSS score of 7.9/10 (HIGH severity). The EPSS model estimates a 0.31% probability of exploitation in the next 30 days.

How do I fix CVE-2026-45654?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-45654?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST