Description
An improper authorization vulnerability in the end-of-life versions of RTU500’s web application allows an authenticated user to trigger the RTU500 to reboot through the reset endpoint. Successful exploitation could cause temporary device unavailability and disruption of its intended operation.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Hitachi Energy | RTU500 series CMU firmware | 9.0 – < 12.0 | 12.0 |
Advisories 2
- ICSA-26-279-06 Hitachi Energy RTU500 CISA ICS & IT advisories · Oct 6, 2026
- WID-SEC-2026-3658 Hitachi Energy RTU500: Mehrere Schwachstellen BSI CERT-Bund (WID) · Sep 29, 2026