7.5
High
CVE-2022-2081 A vulnerability exists in the HCI Modbus TCP function included in the product versions listed above
Description
A vulnerability exists in the HCI Modbus TCP function included in the product versions listed above. If the HCI Modbus TCP is enabled and configured, an attacker could exploit the vulnerability by sending a specially crafted message to the RTU500 in a high rate, causing the targeted RTU500 CMU to reboot. The vulnerability is caused by a lack of flood control which eventually if exploited causes an internal stack overflow in the HCI Modbus TCP function.
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| RTU500 series CMU Firmware | 13.3.1.0 | No fix stated |
| RTU500 series CMU Firmware 13.2 | 13.2.1.0 → 13.2.4.0 | No fix stated |
| RTU500 series CMU Firmware 12.7 | 12.7.1.0 → 12.7.3.0 | No fix stated |
| RTU500 series CMU Firmware 12.6 | 12.6.1.0 → 12.6.7.0 | No fix stated |
| RTU500 series CMU Firmware 12.4 | 12.4.1.0 → 12.4.11.0 | No fix stated |
| RTU500 series CMU Firmware 12.2 | 12.2.1.0 → 12.2.11.0 | No fix stated |
| RTU500 series CMU Firmware 12.0 | 12.0.1.0 → 12.0.13.0 | No fix stated |
Other CVEs of RTU500 series CMU Firmware
The 13 CVEs of RTU500 series CMU Firmware →
CVE-2026-8067
An improper authorization vulnerability in the end-of-life versions of RTU500’s web application allows an…
6.5
Medium
CVE-2026-8066
A directory traversal vulnerability in the file upload functionality of Hitachi Energy RTU500 end-of-life versions…
9.1
Critical
CVE-2026-8065
An authentication bypass vulnerability in the firmware update endpoint of Hitachi Energy RTU500 end-of-life versions…
9.1
Critical
CVE-2026-17539
RTU500 has a vulnerability, where high-load scenarios, such as sending GI requests at short intervals, may cause a…
5.9
Medium