What is CVE-2025-4423?

CVE-2025-4423 is a high-severity vulnerability in Insyde Software Insydeh2o, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 8.2/10. Published 2025-07-30.

How severe is CVE-2025-4423?

High severity. CVSS v3 base score is 8.2 out of 10.

Buffer overflow in Insyde Software Insydeh2o

CVE-2025-4423

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

Vulnerability class: Buffer Overflow

EPSS: 0.002 (8.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.2 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H.

Affected products

Insyde Software Insydeh2o — versions Feature developed for Lenovo

Weakness classification (CWE)

CWE-119 — Improper Restriction of Operations within the Bounds of a Memory Buffer

References

Frequently asked questions

What is CVE-2025-4423?: CVE-2025-4423 is a high-severity vulnerability in Insyde Software Insydeh2o, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 8.2/10. Published 2025-07-30.
How severe is CVE-2025-4423?: High severity. CVSS v3 base score is 8.2 out of 10.