What’s Vulnerable › Vulnerabilities

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

• Severity: high (CVSS 8.2 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-07-30 · updated 2026-06-17
• Weakness: CWE-787

Description

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

Affected products

• Insyde Software InsydeH2O: from Feature developed for Lenovo before L05.05.40.011803.172079 — fixed in L05.05.40.011803.172079

How to fix

Upgrade to a fixed version: Insyde Software InsydeH2O L05.05.40.011803.172079. Check the vendor advisory for mitigations.

References

• https://support.lenovo.com/us/en/product_security/home
• https://www.insyde.com/security-pledge/sa-2025007/

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