CVE-2026-1773
HIGH EPSS 32.8%
Published Feb 24, 20264mo ago · Modified Jun 17, 20262w ago
8.7 CVSS 4.0
Published Feb 24, 2026 4mo ago
Last Modified Jun 17, 2026 2w ago
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.
CVSS Details
Base Score
Exploitability
Impact
Vector string
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 Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope X
Threat Intelligence
EPSS Exploit Probability
32.8% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available
Weaknesses 1
CWE-184
Affected Products 24
| Vendor | Product | Version | Range |
|---|---|---|---|
| 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 | any |
| hitachienergy | rtu540 | * | any |
| 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 | any |
| hitachienergy | rtu560 | * | any |
| 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 | any |
| hitachienergy | rtu520 | * | any |
| 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 | any |
| hitachienergy | rtu530 | * | any |
References 1
- publisher.hitachienergy.com https://publisher.hitachienergy.com/preview?DocumentID=8DBD000237&LanguageCode=en&DocumentPartId=&Action=Launch
Remediation
No remediation data recorded yet
Check vendor advisories and the NVD entry for patch availability.