CVE-2026-1773
Last modified
CVE-2026-1773 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. 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.. EPSS estimates a 0.41% chance of exploitation in the next 30 days.
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.
Metrics
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Hitachienergy | Rtu540 Firmware | >= 12.7.1, <= 12.7.7 |
| Hitachienergy | Rtu540 Firmware | >= 13.5.1, <= 13.5.4 |
| Hitachienergy | Rtu540 Firmware | >= 13.6.1, <= 13.6.2 |
| Hitachienergy | Rtu540 Firmware | >= 13.7.1, < 13.7.8 |
| Hitachienergy | Rtu540 Firmware | 13.8.1 |
| Hitachienergy | Rtu560 Firmware | >= 12.7.1, <= 12.7.7 |
| Hitachienergy | Rtu560 Firmware | >= 13.5.1, <= 13.5.4 |
| Hitachienergy | Rtu560 Firmware | >= 13.6.1, <= 13.6.2 |
| Hitachienergy | Rtu560 Firmware | >= 13.7.1, < 13.7.8 |
| Hitachienergy | Rtu560 Firmware | 13.8.1 |
| Hitachienergy | Rtu520 Firmware | >= 12.7.1, <= 12.7.7 |
| Hitachienergy | Rtu520 Firmware | >= 13.5.1, <= 13.5.4 |
| Hitachienergy | Rtu520 Firmware | >= 13.6.1, <= 13.6.2 |
| Hitachienergy | Rtu520 Firmware | >= 13.7.1, < 13.7.8 |
| Hitachienergy | Rtu520 Firmware | 13.8.1 |
| Hitachienergy | Rtu530 Firmware | >= 12.7.1, <= 12.7.7 |
| Hitachienergy | Rtu530 Firmware | >= 13.5.1, <= 13.5.4 |
| Hitachienergy | Rtu530 Firmware | >= 13.6.1, <= 13.6.2 |
| Hitachienergy | Rtu530 Firmware | >= 13.7.1, < 13.7.8 |
| Hitachienergy | Rtu530 Firmware | 13.8.1 |
References
Timeline
- Published
- Last Modified
- Status
- Modified
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How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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