UEFI BIOS embedded Shell can be used to bypass Secure Boot
Summary
| CVE | CVE-2026-6485 |
|---|---|
| State | PUBLISHED |
| Assigner | Insyde |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-09-09 04:19:36 UTC |
| Updated | 2026-09-10 15:17:39 UTC |
| Description | UEFI BIOS embedded Shell could be used to bypass Secure Boot via shell commands or startup scripts. |
Risk And Classification
Primary CVSS: v3.1 8.2 HIGH from 8338d8cb-57f7-4252-abc0-96fd13e98d21
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
EPSS: 0.001220000 probability, percentile 0.022300000 (date 2026-09-10)
Problem Types: CWE-489 | CWE-489 CWE-489: Active Debug Code
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 3.1 | 8338d8cb-57f7-4252-abc0-96fd13e98d21 | Secondary | 8.2 | HIGH | CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H |
| 3.1 | CNA | CVSS | 8.2 | HIGH | CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H |
CVSS v3.1 Breakdown
Attack Vector
LocalAttack Complexity
LowPrivileges Required
HighUser Interaction
NoneScope
ChangedConfidentiality
HighIntegrity
HighAvailability
HighCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Insyde Software | InsydeH2O | affected See in the Solution | x86, ARM |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| www.insyde.com/security-pledge/sa-2026004 | 8338d8cb-57f7-4252-abc0-96fd13e98d21 | www.insyde.com | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
No vendor comments have been submitted for this CVE.
Additional Advisory Data
Solutions
CNA: Kernel 5.3: Version 05.3A.25 Kernel 5.4: Version 05.48.25 Kernel 5.5: Version 05.56.25 Kernel 5.6: Version 05.63.25
There are currently no legacy QID mappings associated with this CVE.