CVE-2022-28613: Abb RTU500 Firmware

High severity, CVSS 7.5. EPSS: 1% chance of exploitation in the next 30 days.

A vulnerability exists in the HCI Modbus TCP function included in the product versions listed above. If the HCI Modbus TCP is en-abled and configured, an attacker could exploit the vulnerability by sending a specially crafted message to the RTU500, causing the receiving RTU500 CMU to reboot. The vulnerability is caused by the validation error in the length information carried in MBAP header in the HCI Modbus TCP function.

Affected products

• Abb RTU500 Firmware: from 12.2.1.0, before 12.2.12.0 (fixed in 12.2.12.0)
• Hitachienergy RTU500 Firmware: from 12.0.1.0, before 12.0.14.0 (fixed in 12.0.14.0); from 12.4.1.0, before 12.4.12.0 (fixed in 12.4.12.0); from 12.6.1.0, before 12.6.8.0 (fixed in 12.6.8.0); from 12.7.1.0, before 12.7.4.0 (fixed in 12.7.4.0); from 13.2.1.0, before 13.2.5.0 (fixed in 13.2.5.0)

Published 2022-05-02. Last modified 2026-06-17.