CVE-2026-6485: CWE-489: Active Debug Code in Insyde Software InsydeH2O
Description
CVE-2026-6485 is a high-severity vulnerability in Insyde Software's InsydeH2O UEFI BIOS. It involves active debug code in the embedded shell that can be exploited to bypass Secure Boot protections using shell commands or startup scripts. This vulnerability has a CVSS score of 8.2, indicating a significant risk to confidentiality, integrity, and availability. No affected versions or patch information are provided in the available data.
CVSS v3.1
Score 8.2high
Affected software
Insyde Software
InsydeH2O
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2026-6485) concerns active debug code present in the embedded shell of InsydeH2O UEFI BIOS. The embedded shell can be leveraged by an attacker to bypass Secure Boot mechanisms through the execution of shell commands or startup scripts. The CVSS 3.1 vector indicates that exploitation requires local access with high privileges, no user interaction, and results in a complete compromise of confidentiality, integrity, and availability. No vendor advisory or patch information is currently available.
Potential Impact
Successful exploitation allows an attacker with local high privileges to bypass Secure Boot, potentially leading to full system compromise including unauthorized code execution during boot, undermining system security guarantees.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, restrict local administrative access and monitor for unauthorized use of the embedded shell to mitigate risk.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- Insyde
- Date Reserved
- 2026-04-17T06:07:42.556Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6aa0db9eacd9273b49b18911
Added to database: 09/09/2026, 04:07:58 UTC
Last enriched: 09/17/2026, 01:35:42 UTC
Last updated: 10/23/2026, 15:10:14 UTC
Views: 107
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