What is CVE-2026-21410?

CVE-2026-21410 is a critical-severity vulnerability in Insat Masterscada, classified under SQL Injection. CVSS score: 9.8/10. Published 2026-02-24.

How severe is CVE-2026-21410?

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

SQL Injection in Insat Masterscada

CVE-2026-21410

InSAT MasterSCADA BUK-TS is susceptible to SQL Injection through its main web interface. Malicious users that use the vulnerable endpoint are potentially able to cause remote code execution.

Vulnerability class: SQL Injection

Published 2026-02-24 · last modified 2026-06-17.

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: 0.005 (43.9th percentile), scored 2026-10-03.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 44th percentile — 43.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: +0.000

Affected products

Insat Masterscada
Insat Masterscada Buk-Ts — versions All versions

Weakness classification (CWE)

CWE-89 — SQL Injection

References

www.cisa.gov/news-events/ics-advisories/icsa-26-055-01 (US Government Resource, VDB Entry, Third Party Advisory)
github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-055-01.js… (Third Party Advisory)

Frequently asked questions

What is CVE-2026-21410?: CVE-2026-21410 is a critical-severity vulnerability in Insat Masterscada, classified under SQL Injection. CVSS score: 9.8/10. Published 2026-02-24.
How severe is CVE-2026-21410?: Critical severity. CVSS v3 base score is 9.8 out of 10.