RCE in Insat Masterscada
CVE-2026-22553
All versions of InSAT MasterSCADA BUK-TS are susceptible to OS command injection through a field in its MMadmServ web interface. Malicious users that use the vulnerable endpoint are potentially able to cause remote code execution.
Vulnerability class: Command Injection (OS Command Injection)
Published · last modified .
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: 0.015 (72.6th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 73rd percentile — 72.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.014 · newest: 0.015 · change: +0.000
Affected products
- Insat Masterscada
- Insat Masterscada Buk-Ts — versions All versions
Weakness classification (CWE)
Public proof-of-concept exploits
References
- www.cisa.gov/news-events/ics-advisories/icsa-26-055-01 (US Government Resource, VDB Entry)
- 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-2026-22553?
- CVE-2026-22553 is a critical-severity vulnerability in Insat Masterscada, classified under OS Command Injection. CVSS score: 9.8/10. Published 2026-02-24.
- How severe is CVE-2026-22553?
- Critical severity. CVSS v3 base score is 9.8 out of 10.
- Is CVE-2026-22553 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.