CVE-2025-4275

SecureFlashDxe: Incorrect UEFI variable attributes check allows usage of invalid certificate

Published: Jun 11, 2025Updated: Jul 30, 2025 Sources: CVE List NVD

NVD MITRE

7.8CVSSHIGH

Description

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.

CVSS Vector Breakdown

Exploitability

AV:LAttack Vector

Local

AC:HAttack Complexity

High

PR:LPrivileges Required

Low

UI:NUser Interaction

None

Scope

S:CScope

Changed

Impact

C:HConfidentiality

High

I:HIntegrity

High

A:HAvailability

High

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Affected Products

InsydeH2O Insyde Software

Embedded

Hardware Firmware / bios-uefi

insyde softwarecommercialHardware Firmwareaka insyd eh2o, insydeh2o, insydeh2o tools

Exploitability

Official Patch Available

References

https://www.insyde.com/security-pledge/sa-2025002/

insyde.com

https://www.kb.cert.org/vuls/id/211341

kb.cert.org

Timeline

Published

Jun 11, 2025

Last Updated

Jul 30, 2025

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