SB2026061232 - Protection Mechanism Failure in Microsoft Windows Boot Manager
Published: June 12, 2026
Security Bulletin ID
SB2026061232
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Data manipulation
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Protection Mechanism Failure (CVE-ID: CVE-2026-47656)
CWE-ID: CWE-693 - Protection Mechanism Failure
CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a local user to bypass implemented security restrictions.
The vulnerability exists due to insufficient implementation of security measures in Windows Boot Manager. A local administrator can bypass Secure Boot.
Remediation
Install update from vendor's website.