What is CVE-2025-4277?

CVE-2025-4277 is a high-severity vulnerability in Insyde Software Insydeh2o, classified under Improper Input Validation. CVSS score: 7.5/10. Published 2025-08-13.

How severe is CVE-2025-4277?

High severity. CVSS v3 base score is 7.5 out of 10.

Improper input validation in Insyde Software Insydeh2o

CVE-2025-4277

Tcg2Smm has a vulnerability which can be used to write arbitrary memory inside SMRAM and execute arbitrary code at SMM level.

Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)

EPSS: 0.001 (3.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H.

Affected products

Insyde Software Insydeh2o — versions Kernel 5.2, Kernel 5.3, Kernel 5.4

Weakness classification (CWE)

CWE-20 — Improper Input Validation

References

8338d8cb-57f7-4252-abc0-96fd13e98d21

Frequently asked questions

What is CVE-2025-4277?: CVE-2025-4277 is a high-severity vulnerability in Insyde Software Insydeh2o, classified under Improper Input Validation. CVSS score: 7.5/10. Published 2025-08-13.
How severe is CVE-2025-4277?: High severity. CVSS v3 base score is 7.5 out of 10.