CVE-2026-8067: Hitachi Energy RTU500 Series Cmu Firmware

Medium severity, CVSS 6.5. EPSS: 0.3% chance of exploitation in the next 30 days.

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

• Hitachi Energy RTU500 Series Cmu Firmware: from 9.0, before 12.0 (fixed in 12.0)

Published 2026-09-29. Last modified 2026-09-29.