CVE-2022-4608: Hitachienergy RTU500 Firmware

High severity, CVSS 7.5. EPSS: 0.7% chance of exploitation in the next 30 days.

A vulnerability exists in HCI IEC 60870-5-104 function included in certain versions of the RTU500 series product. The vulnerability can only be exploited, if the HCI 60870-5-104 is configured with support for IEC 62351-3. After session resumption interval is expired an RTU500 initiated update of session parameters causes an unexpected restart due to a stack overflow.

Affected products

• Hitachienergy RTU500 Firmware: version 13.3.1 only; version 13.3.2 only; version 13.3.3 only; version 13.4.1 only

Published 2023-07-26. Last modified 2026-06-17.