CVE-2025-4421 HIGH

CVE-2025-4421: EfiSmiServices: gEfiSmmCpuProtocol, SMM memory corruption vulnerabilities in SMM module

Vendor Insyde Software
Product InsydeH2O
Weakness CWE-787
Published July 30, 2025
Last update August 14, 2025
View on NVD All CVEs

CVSS base score

8.2/10
Attack vector Local
Attack complexity Low
Privileges required High
User interaction None
Confidentiality High
Integrity High

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H

What the vulnerability does

01Description

The vulnerability was identified in the code developed specifically for Lenovo. Please visit "Lenovo Product Security Advisories and Announcements" webpage for more information about the vulnerability.  https://support.lenovo.com/us/en/product_security/home

Key dates

02Disclosure timeline

July 30, 2025 CVE published
August 14, 2025 Record updated