CVE-2026-6485 UEFI BIOS - Authentication Bypass

UEFI BIOS embedded Shell contains a Secure Boot bypass caused by shell commands or startup scripts, letting attackers bypass Secure Boot protections, exploit requires access to the embedded shell.

CVSS base score 8.2 /10
High
CISA KEV
Not listed
Public exploit
None known
EPSS
0.18% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Authentication Bypass
Impact
Privilege Escalation
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
Published
9 September 2026
Updated
15 October 2026
Weakness
CWE-489

Vendor fix

Update to the latest BIOS version with Secure Boot protections fixed.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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