Hitachi Energy SuprOS
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Summary
Hitachi Energy is aware of a vulnerability that affects the SuprOS product versions listed in this document. An attacker successfully exploiting this vulnerability can cause confidentiality, integrity and availability impacts. Please refer to the Recommended Immediate Actions for information about the mitigation/remediation.
The following versions of Hitachi Energy SuprOS are affected:
SuprOS vers:SuprOS/
CVSS
Vendor
Equipment
Vulnerabilities
v3 8.8
Hitachi Energy
Hitachi Energy SuprOS
Use of Default Credentials
Background
Critical Infrastructure Sectors: Energy, Transportation Systems, Government Services and Facilities
Countries/Areas Deployed: Worldwide
Company Headquarters Location: Switzerland
Vulnerabilities
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CVE-2025-7740
A default credentials vulnerability exists in the SuprOS product. If exploited, this could allow an authenticated local attacker to gain access through an admin account created during product deployment.
View CVE Details
Affected Products
Hitachi Energy SuprOS
Vendor:Hitachi Energy
Product Version:SuprOS 9.2.1 and below, SuprOS 9.2.2.0
Product Status:known_affected
Remediations
MitigationRemove unwanted accounts and/or change the default passwords. Refer to the Secure Deployment Guidelines document as described in chapter 4.3
MitigationUpon clean install, change the root password
MitigationIf updated from previous version, remove unwanted accounts and/or change the default passwords. Refer to the Secure Deployment Guidelines document as described in chapter 4.3
Vendor fixHitachi Energy recommends that customers apply the update and take recommended actions at the earliest convenience
MitigationWhile reviewing the recommended immediate actions, assess the risk exposure of affected products within the operational environment and update or upgrade if necessary
Relevant CWE: CWE-1392 Use of Default Credentials
Metrics
CVSS Version
Base Score
Base Severity
Vector String
3.1
8.8
HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Acknowledgments
Hitachi Energy reported this vulnerability to CISA.
Notice
The information in this document is subject to change without notice and should not be construed as a commitment by Hitachi Energy. Hitachi Energy provides no warranty, express or implied, including warranties of merchantability and fitness for a particular purpose, for the information contained in this document, and assumes no responsibility for any errors that may appear in this document. In no event shall Hitachi Energy or any of its suppliers be liable for direct, indirect, special, incidental or consequential damages of any nature or kind arising from the use of this document, or from the use of any hardware or software described in this document, even if Hitachi Energy or its suppliers have been advised of the possibility of such damages. This document and parts hereof must not be reproduced or copied without written permission from Hitachi Energy and the contents hereof must not be imparted to a third party nor used for any unauthorized purpose. All rights to registrations and trademarks reside with their respective owners.
Support
For additional information and support please contact your product provider or Hitachi Energy service organization. For contact information, see https://www.hitachienergy.com/contact-us/ for Hitachi Energy contact-centers.
General Mitigation Factors
It is highly recommended to deploy the product following the “SuprOS Security Deployment Guidelines” document. Customers should maintain their systems with products running on supported versions and follow maintenance releases. Recommended security practices and firewall configurations can help protect a process control network from attacks that originate from outside the network. Such practices include that process control systems are physically protected from direct access by unauthorized personnel, have no direct connections to the Internet, and are separated from other networks by means of a firewall system that has a minimal number of ports exposed, and others that have to be evaluated case by case. Process control systems should not be used for Internet surfing, instant messaging, or receiving e-mails. Portable computers and removable storage media should be carefully scanned for viruses before they are connected to a control system.
Legal Notice and Terms of Use
This product is provided subject to this Notification (https://www.cisa.gov/notification) and this Privacy & Use policy (https://www.cisa.gov/privacy-policy).
Recommended Practices
CISA recommends users take defensive measures to minimize the exploitation risk of these vulnerabilities.
Minimize network exposure for all control system devices and/or systems, and ensure they are not accessible from the internet.
Locate control system networks and remote devices behind firewalls and isolate them from business networks.
When remote access is required, use more secure methods, such as Virtual Private Networks (VPNs), recognizing VPNs may have vulnerabilities and should be updated to the most recent version available. Also recognize VPN is only as secure as its connected devices.
CISA reminds organizations to perform proper impact analysis and risk assessment prior to deploying defensive measures.
CISA also provides a section for control systems security recommended practices on the ICS webpage on cisa.gov. Several CISA products detailing cyber defense best practices are available for reading and download, including Improving Industrial Control Systems Cybersecurity with Defense-in-Depth Strategies.
CISA encourages organizations to implement recommended cybersecurity strategies for proactive defense of ICS assets. Additional mitigation guidance and recommended practices are publicly available on the ICS webpage at cisa.gov in the technical information paper, ICS-TIP-12-146-01B--Targeted Cyber Intrusion Detection and Mitigation Strategies.
Organizations observing suspected malicious activity should follow established internal procedures and report findings to CISA for tracking and correlation against other incidents.
Advisory Conversion Disclaimer
This ICSA is a verbatim republication of Hitachi Energy PSIRT 8DBD000223 from a direct conversion of the vendor's Common Security Advisory Framework (CSAF) advisory. This is republished to CISA's website as a means of increasing visibility and is provided "as-is" for informational purposes only. CISA is not responsible for the editorial or technical accuracy of republished advisories and provides no warranties of any kind regarding any information contained within this advisory. Further, CISA does not endorse any commercial product or service. Please contact Hitachi Energy PSIRT directly for any questions regarding this advisory.
Revision History
Initial Release Date: 2026-01-27
Date
Revision
Summary
2026-01-27
1
Initial public release
2026-02-12
2
Initial CISA Republication of Hitachi Energy 8DBD000223 advisory
Legal Notice and Terms of Use
Source: https://www.cisa.gov/news-events/ics-advisories/icsa-26-043-09