CVE-2025-4275 json
SecureFlashDxe: Incorrect UEFI variable attributes check allows usage of invalid certificate
published 2025-06-11 16 mo ago modified 2026-06-17 4 mo ago also EUVD-2025-18070
- cvss
- 7.8
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.5%
- EPSS 0.5% chance of exploitation in 30 days, percentile 41%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- Insyde Software InsydeH2O 05.2A.16, 05.39.16, 05.47.16, 05.55.16, 05.62.16, 05.71.16
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- total
- Assessed
- 16 mo ago
Exploit prediction
0.48% chance of exploitation in the next 30 days, higher than 41% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 7.8 | CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H |
Affected products
- Insyde Software InsydeH2O
References
Sources
- CVE List CVE-2025-4275
- NVD CVE-2025-4275
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