CVE-2026-17539

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-17539
StatePUBLISHED
AssignerHitachi Energy
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-09-03 13:04:35 UTC
Updated2026-09-03 16:43:15 UTC
DescriptionRTU500 has a vulnerability, where high-load scenarios, such as sending GI requests at short intervals, may cause a NULL pointer dereference in the last entry of the enhanced message queue. This can cause a BCI_IEC104 fatal write error, resulting in connection interruption and restart, and ultimately a denial of service for bidirectional IEC 60870-5-104 communication.

Risk And Classification

Primary CVSS: v3.1 5.9 MEDIUM from [email protected]

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

EPSS: 0.003510000 probability, percentile 0.281180000 (date 2026-09-07)

Problem Types: CWE-476 | CWE-476 CWE-476 NULL pointer dereference

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary5.9MEDIUMCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
3.1CNACVSS5.9MEDIUMCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Hitachi Energy RTU500 Series CMU Firmware affected 12.7.1 12.7.7 custom Not specified
CNA Hitachi Energy RTU500 Series CMU Firmware affected 13.5.1 13.5.4 custom Not specified
CNA Hitachi Energy RTU500 Series CMU Firmware affected 13.6.1 13.6.3 custom Not specified
CNA Hitachi Energy RTU500 Series CMU Firmware affected 13.7.1 13.7.8 custom Not specified
CNA Hitachi Energy RTU500 Series CMU Firmware affected 13.8.1 13.8.2 custom Not specified

References

ReferenceSourceLinkTags
publisher.hitachienergy.com/preview [email protected] publisher.hitachienergy.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

© CVE.report 2026

Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. It is the responsibility of user to evaluate the accuracy, completeness or usefulness of any information, opinion, advice or other content. EACH USER WILL BE SOLELY RESPONSIBLE FOR ANY consequences of his or her direct or indirect use of this web site. ALL WARRANTIES OF ANY KIND ARE EXPRESSLY DISCLAIMED. This site will NOT BE LIABLE FOR ANY DIRECT, INDIRECT or any other kind of loss.

CVE, CWE, and OVAL are registred trademarks of The MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. This site includes MITRE data granted under the following license.

Free CVE JSON API cve.report/api

CVE.report and Source URL Uptime Status status.cve.report