What is CVE-2026-8603?

CVE-2026-8603 is a critical-severity vulnerability in Scadabr, classified under OS Command Injection. CVSS score: 9.8/10. Published 2026-05-19.

How severe is CVE-2026-8603?

Critical severity. CVSS v3 base score is 9.8 out of 10.

RCE in Scadabr

CVE-2026-8603

In ScadaBR version 1.2.0, an OS Command Injection vulnerability could allow an attacker to execute commands as root on the SCADA system.

Vulnerability class: Command Injection (OS Command Injection)

Published 2026-05-19 · last modified 2026-07-23.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.021 (81.0th percentile), scored 2026-10-19.

Low probability of exploitation in the next 30 days, but still tracked. 81st percentile — 81.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.013 · newest: 0.021 · change: +0.007

Affected products

Scadabr — versions 1.2, 1.2.0

Weakness classification (CWE)

CWE-78 — OS Command Injection

References

www.cisa.gov/news-events/ics-advisories/icsa-26-139-03 (US Government Resource, Third Party Advisory, government-resource)

Frequently asked questions

What is CVE-2026-8603?: CVE-2026-8603 is a critical-severity vulnerability in Scadabr, classified under OS Command Injection. CVSS score: 9.8/10. Published 2026-05-19.
How severe is CVE-2026-8603?: Critical severity. CVSS v3 base score is 9.8 out of 10.