---
title: "CVE-2026-6485: UEFI BIOS - Authentication Bypass"
description: "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."
url: https://panop.io/threat-heartbeat/CVE-2026-6485/
---

# 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 ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-6485)

## 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](https://cwe.mitre.org/data/definitions/489.html)

## 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

- [https://nvd.nist.gov/vuln/detail/CVE-2026-6485](https://nvd.nist.gov/vuln/detail/CVE-2026-6485)
- [https://www.insyde.com/security-pledge/sa-2026004/](https://www.insyde.com/security-pledge/sa-2026004/)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

Panop answers these inside your environment, for this CVE and every other finding.

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