CVE-2026-1773

HIGH

7.5

Description

IEC 60870-5-104: 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.

CVE Details

CVSS v3.1 Score7.5

SeverityHIGH

CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack VectorNETWORK

ComplexityLOW

Privileges RequiredNONE

User InteractionNONE

Published2/24/2026

Last Modified2/27/2026

Sourcenvd

Honeypot Sightings0

Affected Products

hitachienergy:rtu520hitachienergy:rtu520_firmwarehitachienergy:rtu530hitachienergy:rtu530_firmwarehitachienergy:rtu540hitachienergy:rtu540_firmwarehitachienergy:rtu560hitachienergy:rtu560_firmware

Weaknesses (CWE)

CWE-184

References

https://publisher.hitachienergy.com/preview?DocumentID=8DBD000237&LanguageCode=en&DocumentPartId=&Action=Launch(cybersecurity@hitachienergy.com)

IOC Correlations

No correlations recorded

This product uses data from the NVD API but is not endorsed or certified by the NVD.