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CVE Vulnerability Details :
CVE-2026-1773
PUBLISHED
More InfoOfficial Page
Assigner-Hitachi Energy
Assigner Org ID-e383dce4-0c27-4495-91c4-0db157728d17
View Known Exploited Vulnerability (KEV) details
Published At-24 Feb, 2026 | 13:13
Updated At-28 Feb, 2026 | 02:20
Rejected At-
▼CVE Numbering Authority (CNA)

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.

Affected Products
Vendor
Hitachi Energy Ltd.Hitachi Energy
Product
RTU500 series CMU firmware
Default Status
unaffected
Versions
Affected
  • From 12.7.1 through 12.7.7 (custom)
  • From 13.5.1 through 13.5.4 (custom)
  • From 13.6.1 through 13.6.2 (custom)
  • From 13.7.1 through 13.7.7 (custom)
  • 13.8.1 (custom)
Problem Types
TypeCWE IDDescription
CWECWE-184CWE-184 Incomplete List of Disallowed Inputs
Type: CWE
CWE ID: CWE-184
Description: CWE-184 Incomplete List of Disallowed Inputs
Metrics
VersionBase scoreBase severityVector
4.08.7HIGH
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
Version: 4.0
Base score: 8.7
Base severity: HIGH
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
Metrics Other Info
Impacts
CAPEC IDDescription
CAPEC-278CAPEC-278 Web Services Protocol Manipulation
CAPEC ID: CAPEC-278
Description: CAPEC-278 Web Services Protocol Manipulation
Solutions
Configurations
Workarounds
Exploits
Credits
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
https://publisher.hitachienergy.com/preview?DocumentID=8DBD000237&LanguageCode=en&DocumentPartId=&Action=Launch
N/A
Hyperlink: https://publisher.hitachienergy.com/preview?DocumentID=8DBD000237&LanguageCode=en&DocumentPartId=&Action=Launch
Resource: N/A
▼Authorized Data Publishers (ADP)
CISA ADP Vulnrichment
Affected Products
Metrics
VersionBase scoreBase severityVector
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
Details not found