CVE-2026-1773 - Vulnerability Details - OpenCVE

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.

Attack Vector Network

Attack Complexity Low

Privileges Required None

Attack Requirements None

User Interaction None

Vulnerable System Confidentiality Impact None

Vulnerable System Integrity Impact None

Vulnerable System Availability Impact High

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

No CVSS v3.1

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Key SSVC decision points have not yet been added.

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References

Link	Providers
https://publisher.hitachienergy.com/preview?DocumentID=8DBD000237&LanguageCode=en&DocumentPartId=&Action=Launch

History

Tue, 24 Feb 2026 14:00:00 +0000

Type	Values Removed	Values Added
Weaknesses	CWE-20	CWE-184

Tue, 24 Feb 2026 13:30:00 +0000

Type	Values Removed	Values Added
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.
Weaknesses		CWE-20
References		https://publisher.hitachienergy.com/preview?DocumentID=8DBD000237&LanguageCode=en&DocumentPartId=&Action=Launch
Metrics		cvssV4_0 `{'score': 8.7, 'vector': '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'}`

MITRE

Status: PUBLISHED

Assigner: Hitachi Energy

Published: 2026-02-24T13:13:17.990Z

Updated: 2026-02-24T13:40:55.104Z

Reserved: 2026-02-02T16:28:59.394Z

Link: CVE-2026-1773

Vulnrichment

No data.

NVD

Status : Received

Published: 2026-02-24T14:16:22.420

Modified: 2026-02-24T14:16:22.420

Link: CVE-2026-1773

Redhat

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OpenCVE Enrichment

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