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
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
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
Frequently Asked Questions
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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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