Description
A directory traversal vulnerability in the file upload functionality of Hitachi Energy RTU500 end-of-life versions allows an unauthenticated attacker to write or overwrite arbitrary files on the device file system. Depending on the files affected, successful exploitation could result in unauthorized modification of device data or disruption of the device’s 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