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Industrial control advisoryKnown exploitedSeverity 8.8 highExploit likelihood 98%
Hitachi Energy SOI
ICSA-26-279-04 · CISA · September 29, 2026
Summary
Hitachi Energy is aware of RCE (Remote Code Execution) vulnerability in Apache ActiveMQ component of SOI product versions listed in this document. These vulnerabilities can be exploited to carry out various attacks affecting confidentiality, integrity, and availability of the product. Please refer to the Recommended Immediate Actions for information about the mitigation/remediation.
From CISA, quoted as published. Check the source before acting.
What to do
Apply the patch SOI EP2, which upgrades the ActiveMQ version (JMS message broker) for the SOI Core to version 5.19.5.
EP2 is a cumulative patch that covers previous EP1 patch. EP2 also upgrades the SOI management scripts to the latest version and installs an upgraded OpenJDK version 11 to run ActiveMQ MESSAGE BROKER in the newer JRE. It also upgrades the ActiveMQ client libraries installed in the WildFly module.
Follow General Mitigation Factors/Workarounds and refer to the product deployment guidelines for securing the product environment.
Vendor fix or mitigation, quoted from the advisory.
Each CVE in this advisory
| CVE | Severity | Known exploited | Exploit likelihood |
|---|---|---|---|
| CVE-2026-34197 | 8.8 high | Exploited | 98.3% |
Severity from the advisory (CVSS), known exploitation from CISA's catalog, exploit likelihood from EPSS (next 30 days).
Affected products
| Vendor | Product |
|---|---|
| Hitachi Energy | SOI |
Why it's on these mode pages
- Maritime: Vendor table: Hitachi Energy (industrial control makers used in every mode, all modes) (matched by rule)
- Pipeline: Vendor table: Hitachi Energy (industrial control makers used in every mode, all modes) (matched by rule)
- Freight rail: Vendor table: Hitachi Energy (industrial control makers used in every mode, all modes) (matched by rule)
- Passenger rail and transit: Vendor table: Hitachi Energy (industrial control makers used in every mode, all modes) (matched by rule)
- Highway and motor carrier: Vendor table: Hitachi Energy (industrial control makers used in every mode, all modes) (matched by rule)
- Postal and parcel: Vendor table: Hitachi Energy (industrial control makers used in every mode, all modes) (matched by rule)
Change history
- September 29, 2026: Initial public release
- October 6, 2026: Initial CISA Republication of Hitachi Energy PSIRT 8DBD000244 advisory
- November 9, 2026: First collected by Watch
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