8.7
High
CVE-2026-1773 IEC 60870-5-104 used in RTU500: Potential Denial of Service impact on reception of invalid U-format frame. Product is…
Description
IEC 60870-5-104 used in RTU500: Potential Denial of Service impact on reception of invalid U-format frame. Product is only affected if IEC 60870-5-104 bi-directional functionality is configured. Enabling secure communication following IEC 62351-3 does not remediate the vulnerability but mitigates the risk of exploitation.
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| RTU500 series CMU Firmware | 13.8.1 | No fix stated |
| RTU500 series CMU Firmware 13.7 | 13.7.1 → 13.7.7 | No fix stated |
| RTU500 series CMU Firmware 13.6 | 13.6.1 → 13.6.2 | No fix stated |
| RTU500 series CMU Firmware 13.5 | 13.5.1 → 13.5.4 | No fix stated |
| RTU500 series CMU Firmware 12.7 | 12.7.1 → 12.7.7 | 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