Hitachi Energy Service Suite
1. EXECUTIVE SUMMARY
- CVSS v4 9.3
- ATTENTION: Exploitable remotely/low attack complexity
- Vendor: Hitachi Energy
- Equipment: Service Suite
- Vulnerability: Deserialization of Untrusted Data
2. RISK EVALUATION
Successful exploitation of this vulnerability could allow attackers to compromise Oracle WebLogic Server, resulting in potential impacts on confidentiality, integrity, and availability.
3. TECHNICAL DETAILS
3.1 AFFECTED PRODUCTS
Hitachi Energy reports that the following products are affected:
- Service Suite: Versions prior to 9.6.0.4 EP4
3.2 VULNERABILITY OVERVIEW
3.2.1 DESERIALIZATION OF UNTRUSTED DATA CWE-502
Easily exploitable vulnerability allows unauthenticated attacker with network access via IIOP, T3 to compromise Oracle WebLogic Server. Successful attacks of this vulnerability can result in takeover of Oracle WebLogic Server.
CVE-2020-2883 has been assigned to this vulnerability. A CVSS v3.1 base score of 9.8 has been calculated; the CVSS vector string is (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H).
A CVSS v4 score has also been calculated for CVE-2020-2883. A base score of 9.3 has been calculated; the CVSS vector string is (CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N).
3.3 BACKGROUND
- CRITICAL INFRASTRUCTURE SECTORS: Energy
- COUNTRIES/AREAS DEPLOYED: Worldwide
- COMPANY HEADQUARTERS LOCATION: Switzerland
3.4 RESEARCHER
Hitachi Energy PSIRT reported this vulnerability to CISA.
4. MITIGATIONS
Hitachi Energy has identified the following specific workarounds and mitigations users can apply to reduce risk:
- Service Suite versions prior to 9.6.0.4 EP4: Update to version 9.8.2 or latest- Hitachi Energy recommends that customers apply the update at the earliest convenience - While reviewing the recommended immediate actions, assess the risk exposure of affected products within the operational environment and update or upgrade if necessary.
- Service Suite versions prior to 9.6.0.4 EP4: Apply general Mitigation Factors.
For more information see the associated Hitachi Energy PSIRT security advisory 8DBD000215 Remote Code Execution Vulnerability in Hitachi Energy Service Suite Product.
CISA recommends users take defensive measures to minimize the risk of exploitation of this vulnerability, such as:
- Minimize network exposure for all control system devices and/or systems, ensuring they are not accessible from the internet.
- Locate control system networks and remote devices behind firewalls and isolating them from business networks.
- When remote access is required, use more secure methods, such as Virtual Private Networks (VPNs). Recognize VPNs may have vulnerabilities, should be updated to the most recent version available, and are only as secure as the 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.
No known public exploitation specifically targeting this vulnerability has been reported to CISA at this time.
5. UPDATE HISTORY
- September 18, 2025: Initial Republication of Hitachi Energy PSIRT 8DBD000215
This product is provided subject to this Notification and this Privacy & Use policy.
Vendor
- Hitachi Energy