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

Quick assessment

Affected
Insyde Software InsydeH2O
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

UEFI BIOS 中嵌入的 Shell 可通过 shell 命令或启动脚本绕过安全启动（Secure Boot）。

CVSS 8.2 · High

Possible ATT&CK Techniques 1 AI

T1542 · Pre-OS Boot
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I. Basic Information for CVE-2026-6485

Vulnerability Information
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Vulnerability Title
UEFI BIOS embedded Shell can be used to bypass Secure Boot
Source: CVE Program / CVE List V5
Vulnerability Description
UEFI BIOS embedded Shell could be used to bypass Secure Boot via shell commands or startup scripts.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
遗留的调试代码
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Insyde Software InsydeH2O See in the Solution -

II. Public POCs for CVE-2026-6485

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III. Intelligence Information for CVE-2026-6485

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Vendor Advisories for CVE-2026-6485 (1)

IV. Related Vulnerabilities

Same product: InsydeH2O
Same vendor: Insyde Software
Same weakness: CWE-489

V. Comments for CVE-2026-6485

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