ICSA-26-279-05: Hitachi Energy REB500
CISA advisory · released 2026-09-29
Source record Collected from CISA's CSAF advisory feed
- Distribution label in the document: TLP:WHITE
- Revision 2, 2026-10-06 (final)
CISA's summary
Summary: Hitachi Energy is aware of open-source software vulnerabilities that affect REB500 product versions listed in this document. These vulnerabilities can be exploited to carry out Denial of Service (DoS) attack on the product. Please refer to the Recommended Immediate Actions for information about the mitigation/remediation.
Products, as the advisory lists them
| Vendor | Product | Version |
|---|---|---|
| Hitachi Energy | REB500 | vers:REB500/<=8.3.3.1 |
DeSpy has not checked any unit, hardware revision or firmware.
Vulnerabilities in this advisory
- CVE-2024-8176 — CVE-2024-8176 · CWE-674
A stack overflow vulnerability exists in the libexpat library used by the IEC61850 functionality supported by REB500 product. An authenticated malicious user with local access could use a crafted IEC 61850 message to exploit the vulnerability in the libexpat library. This issue could lead to denial of service (DoS) or, in some cases, exploitable memory corruption, depending on the environment and library usage.
- CVE-2025-59375 — CVE-2025-59375 · CWE-770
libexpat in Expat before 2.7.2 used by the IEC 61850 functionality supported by the REB500 product allows authenticated users to trigger large dynamic memory allocations via a small document that is submitted for parsing.
Acknowledgments, as the advisory lists them
- Hitachi Energy Internal Team
The advisory's legal 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.
Sources
DeSpy's copy of this version is dated 2026-10-06.
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