Vulnerability · Published Aug 12, 2026 · Assigned by Insyde
CVE-2026-6484Lack of verified boot to certain FV may cause arbitrary code execution
High 8.2
In plain English
A high-severity security flaw in InsydeH2O from Insyde Software. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 32% of all known vulnerabilities).
Severity (CVSS 3.1)8.2High
Exploit odds (30 days)0.4%top 68.5% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
In an UEFI, Lack of verified boot to certain FV may cause arbitrary code execution.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Insyde Software | InsydeH2O | see references |
Weakness: CWE-1277 · Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H