What is CVE-2026-12855?

CVE-2026-12855 is a high-severity vulnerability in Insyde Software Insydeh2o, classified under Improper Input Validation. CVSS score: 8.2/10. Published 2026-09-09.

How severe is CVE-2026-12855?

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

Improper input validation in Insyde Software Insydeh2o

CVE-2026-12855

Unvalidated memory boundary could result in arbitrary code execution. The vulnerability exists in the code developed specifically for HP projects.

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

Published 2026-09-09 · last modified 2026-10-01.

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.

EPSS exploit prediction

EPSS: 0.001 (2.0th percentile), scored 2026-10-24.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 2nd percentile — 2.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.001 · newest: 0.001 · change: 0.000

Affected products

Insyde Software Insydeh2o — versions See in the Solution

Weakness classification (CWE)

CWE-20 — Improper Input Validation

References

Frequently asked questions

What is CVE-2026-12855?: CVE-2026-12855 is a high-severity vulnerability in Insyde Software Insydeh2o, classified under Improper Input Validation. CVSS score: 8.2/10. Published 2026-09-09.
How severe is CVE-2026-12855?: High severity. CVSS v3 base score is 8.2 out of 10.