CVE-2026-6484: CWE-1277: Insufficient Verification of Data Authenticity in Firmware in Insyde Software InsydeH2O
CVE-2026-6484 is a high-severity vulnerability in Insyde Software's InsydeH2O UEFI firmware. It involves insufficient verification of data authenticity due to lack of verified boot for certain firmware volumes (FV), which can lead to arbitrary code execution. The vulnerability has a CVSS score of 8.2, indicating significant impact on confidentiality, integrity, and availability. No specific affected versions or patches have been disclosed yet. There are no known exploits in the wild at this time.
AI Analysis
Technical Summary
This vulnerability in InsydeH2O firmware arises from insufficient verification of data authenticity, specifically the absence of verified boot for certain firmware volumes. This flaw can allow an attacker with high privileges and local access to execute arbitrary code within the UEFI environment. The CVSS 3.1 vector indicates low attack complexity, required high privileges, no user interaction, and a scope change with high impact on confidentiality, integrity, and availability. No vendor advisory or patch information is currently available.
Potential Impact
Successful exploitation could result in arbitrary code execution at the firmware level, compromising system confidentiality, integrity, and availability. This could allow attackers to bypass security controls and persist at a low level in the system firmware. However, exploitation requires local access with high privileges.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, restrict local administrative access and monitor for suspicious activity related to firmware modifications.
CVE-2026-6484: CWE-1277: Insufficient Verification of Data Authenticity in Firmware in Insyde Software InsydeH2O
Description
CVE-2026-6484 is a high-severity vulnerability in Insyde Software's InsydeH2O UEFI firmware. It involves insufficient verification of data authenticity due to lack of verified boot for certain firmware volumes (FV), which can lead to arbitrary code execution. The vulnerability has a CVSS score of 8.2, indicating significant impact on confidentiality, integrity, and availability. No specific affected versions or patches have been disclosed yet. There are no known exploits in the wild at this time.
CVSS v3.1
Score 8.2high
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability in InsydeH2O firmware arises from insufficient verification of data authenticity, specifically the absence of verified boot for certain firmware volumes. This flaw can allow an attacker with high privileges and local access to execute arbitrary code within the UEFI environment. The CVSS 3.1 vector indicates low attack complexity, required high privileges, no user interaction, and a scope change with high impact on confidentiality, integrity, and availability. No vendor advisory or patch information is currently available.
Potential Impact
Successful exploitation could result in arbitrary code execution at the firmware level, compromising system confidentiality, integrity, and availability. This could allow attackers to bypass security controls and persist at a low level in the system firmware. However, exploitation requires local access with high privileges.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, restrict local administrative access and monitor for suspicious activity related to firmware modifications.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- Insyde
- Date Reserved
- 2026-04-17T06:07:36.576Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a7bc148bf8831d539b13eb1
Added to database: 08/12/2026, 00:41:44 UTC
Last enriched: 08/12/2026, 00:56:05 UTC
Last updated: 08/12/2026, 02:00:56 UTC
Views: 6
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