CVE-2026-1773

HIGH EPSS 32.8%
Published Feb 24, 20264mo ago · Modified Jun 17, 20262w ago
8.7 CVSS 4.0
High
Find Similar
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
8.7
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

VendorProductVersionRange
hitachienergyrtu540_firmware*≥12.7.1  –  ≤12.7.7
hitachienergyrtu540_firmware*≥13.5.1  –  ≤13.5.4
hitachienergyrtu540_firmware*≥13.6.1  –  ≤13.6.2
hitachienergyrtu540_firmware*≥13.7.1  –  <13.7.8
hitachienergyrtu540_firmware13.8.1any
hitachienergyrtu540*any
hitachienergyrtu560_firmware*≥12.7.1  –  ≤12.7.7
hitachienergyrtu560_firmware*≥13.5.1  –  ≤13.5.4
hitachienergyrtu560_firmware*≥13.6.1  –  ≤13.6.2
hitachienergyrtu560_firmware*≥13.7.1  –  <13.7.8
hitachienergyrtu560_firmware13.8.1any
hitachienergyrtu560*any
hitachienergyrtu520_firmware*≥12.7.1  –  ≤12.7.7
hitachienergyrtu520_firmware*≥13.5.1  –  ≤13.5.4
hitachienergyrtu520_firmware*≥13.6.1  –  ≤13.6.2
hitachienergyrtu520_firmware*≥13.7.1  –  <13.7.8
hitachienergyrtu520_firmware13.8.1any
hitachienergyrtu520*any
hitachienergyrtu530_firmware*≥12.7.1  –  ≤12.7.7
hitachienergyrtu530_firmware*≥13.5.1  –  ≤13.5.4
hitachienergyrtu530_firmware*≥13.6.1  –  ≤13.6.2
hitachienergyrtu530_firmware*≥13.7.1  –  <13.7.8
hitachienergyrtu530_firmware13.8.1any
hitachienergyrtu530*any

References 1

  • publisher.hitachienergy.com https://publisher.hitachienergy.com/preview?DocumentID=8DBD000237&LanguageCode=en&DocumentPartId=&Action=Launch
    Vendor Advisory

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.