Lack of verified boot to certain FV may cause arbitrary code execution

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-6484
StatePUBLISHED
AssignerInsyde
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-12 01:17:08 UTC
Updated2026-08-12 13:17:24 UTC
DescriptionIn an UEFI, Lack of verified boot to certain FV may cause arbitrary code execution.

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: 0.001440000 probability, percentile 0.041520000 (date 2026-08-12)

Problem Types: CWE-1277 | CWE-1277 CWE-1277: Insufficient Verification of Data Authenticity in Firmware

VersionSourceTypeScoreSeverityVector
3.18338d8cb-57f7-4252-abc0-96fd13e98d21Secondary8.2HIGHCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
3.1CNACVSS8.2HIGHCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
High
User Interaction
None
Scope
Changed
Confidentiality
High
Integrity
High
Availability
High

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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Insyde Software InsydeH2O unknown See in the Solution x86

References

ReferenceSourceLinkTags
www.insyde.com/security-pledge/sa-2026003 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

Vendor Comments And Credit

Discovery Credit

CNA: Thanks to Nikolaj Schlej, independent firmware security researcher, for reporting the vulnerability and engaging in this coordinated disclosure. (en)

Additional Advisory Data

Solutions

CNA: Intel Mobile Platforms: Panther Lake: Unaffected Lunar Lake: Unaffected Aarow Lake H/U: Version 05.56.17.0022 Aarow Lake S/HX: Version 05.56.17.0037 Rapter Lake: Version 05.47.24.0058 Twin Lake: Version 05.44.45.0029   Intel Server/Embedded platforms: Whitley (CLX/CPX/ICX): Trunk CedarIsland (CPX): Trunk Eagle Stream: Unaffected Birch Stream: Unaffected Mehlow/Mehlow-R(CFL-S): Unaffected Tatlow (RKS): Unaffected Jacobsville(SNR): Trunk Idaville: Trunk Kaseyville: Unaffected Whiskey Lake: Trunk Come tLake-S: Unaffected Tiger Lake UP3/H: Unaffected Alder Lake: Version 05.47.24.2057 Raptor Lake: Version 05.47.24.0057 Meteor Lake – U/H ARL-H/U: Version 05.56.07.0022 Meteor Lake – PS ARL-H/U: Version 05.56.07.0022 Arrow Lake – S ARL-S/HX: Version 05.55.45.0036 Arrow Lake – U/H ARL-H/U: Version 05.56.07.0022 Elkhart Lake: Version 05.48.17.0030 Alder Lake N: Trunk Amston Lake: Trunk Twin Lake: Trunk

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