What is CVE-2026-19656?

CVE-2026-19656 is a critical-severity vulnerability in Scada-lts Scadalts, classified under Missing Authorization. CVSS score: 9.9/10. Published 2026-08-12.

How severe is CVE-2026-19656?

Critical severity. CVSS v3 base score is 9.9 out of 10.

Auth bypass in Scada-lts Scadalts

CVE-2026-19656

ScadaLTS 2.7.8.1 exposes a server-side method that lacks authorization checks, allowing any authenticated user (including one holding only low-privilege, read-only permissions) to execute arbitrary operating system commands on the host. Su…

Vulnerability class: Broken Access Control

CVSS v3 metric

CVSS v3 base score 9.9 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H.

Affected products

Scada-lts Scadalts — versions 2.7.8.1

Weakness classification (CWE)

CWE-862 — Missing Authorization

References

vulnreport@tenable.com

Frequently asked questions

What is CVE-2026-19656?: CVE-2026-19656 is a critical-severity vulnerability in Scada-lts Scadalts, classified under Missing Authorization. CVSS score: 9.9/10. Published 2026-08-12.
How severe is CVE-2026-19656?: Critical severity. CVSS v3 base score is 9.9 out of 10.