CVE-2025-4275
SecureFlashDxe: Incorrect UEFI variable attributes check allows usage of invalid certificate
HIGH 7.8EPSS 0.5%
A vulnerability in the digital signature verification process does not properly validate variable attributes which allows an attacker to bypass signature verification by creating a non-authenticated NVRAM variable. An attacker may to execute arbitrary signed UEFI code and bypass Secure Boot.
- Affected
- Insyde Software · InsydeH2O
- CVSS v3.1 CNA
- 7.8 HIGH
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H - EPSS
- 0.48% chance of exploitation in the next 30 days, 40th percentile
- Published
- 2025-06-11
- Updated
- 2025-08-14
Proof-of-concept exploits (1)
- TheMalwareGuardian/CVE-2025-4275/blob/d808800e2431ed27a65315fc947937144603596a/02%20Explo…0★ · 2026-08-16