CVE-2026-2459: Hitachienergy REB500 Firmware

High severity, CVSS 8.1. EPSS: 0.3% chance of exploitation in the next 30 days.

A vulnerability exists in REB500 for an authenticated user with Installer role to access and alter the contents of directories that the role is not authorized to do so.

Affected products

• Hitachienergy REB500 Firmware: up to and including 8.3.3.0

Published 2026-02-24. Last modified 2026-06-17.