CVE-2026-6485: UEFI BIOS embedded Shell can be used to bypass Secure Boot

Overview

Severity

High (CVSS 8.2)

CVSS Vector

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

Exploit Status

Not Exploited

Patch Tuesday

2026-Sep

Released

2026-09-11

EPSS Score

0.12% (percentile: 2.2%)

Affected Products (2)

Other

• 21780-17084
• 21818-17084

Security Updates (1)

• Security Update

Revision History

• 2026-09-11: Information published.