SB20261110359 - Improper Check for Certificate Revocation in Azure Virtual Machines
Published: November 10, 2026
Security Bulletin ID
SB20261110359
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) Improper Check for Certificate Revocation (CVE-ID: CVE-2026-109462)
CWE-ID: CWE-299 - Improper Check for Certificate Revocation
CVSSv4: 6.7 [CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N]
The vulnerability allows a local privileged user to bypass Secure Boot.
The vulnerability exists due to improper checking of certificate revocation in Azure Firmware when validating certificates for Secure Boot. A local privileged user can exploit insufficient certificate revocation checks to bypass Secure Boot.
Remediation
Install update from vendor's website.