[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$felmpE-vbUh0yjLU82T0TegY95F5lKRMTMqzi5rIZlEs":3},{"article":4,"iocs":52},{"id":5,"title":6,"slug":7,"summary":8,"ai_summary":9,"brief":10,"full_text":11,"url":12,"image_url":13,"published_at":14,"ingested_at":15,"relevance_score":16,"entities":17,"category_id":30,"category":31,"article_tags":34},"87e28dae-d0ea-4073-bedb-6a99253f61a4","Hitachi Energy RTU500","hitachi-energy-rtu500-db461c","View CSAF Summary Hitachi Energy is publishing this cybersecurity advisory in response to the security findings reported by Dragos affecting end-of-life RTU500 CMU firmware version 9.x. The reported findings are associated with legacy RTU500 firmware versions that were developed according to the cybersecurity requirements, threat landscape, and industry practices that existed at the time of their release. As cybersecurity threats and security expectations have evolved, these end-of-life versions no longer incorporate many of the security controls and hardening measures that are standard in modern industrial control systems. Over successive RTU500 releases, Hitachi Energy has continuously enhanced the security of the product through the introduction of additional security features, protocol hardening, stronger authentication and access controls, encrypted communications, and other security-by-design improvements. While the findings reported by Dragos do not affect currently supported RTU500 CMU firmware versions, there is a likelihood that the end-of-life versions 11.x and prior are affected by these vulnerabilities. Since the end-of-life versions are no longer maintained with security updates, Hitachi Energy strongly recommends upgrading to a currently supported RTU500 firmware version. Customers should also implement appropriate defense-in-depth measures and cybersecurity best practices to reduce risk and strengthen the security posture of their operational environments. Please refer to the Recommended Immediate Actions for information about the mitigation\u002Fremediation. The following versions of Hitachi Energy RTU500 are affected: RTU500 series CMU Firmware vers:RTU500_series_CMU_Firmware\u002F\u003C=11.x (CVE-2026-8065, CVE-2026-8066, CVE-2026-8067, CVE-2010-2965, CVE-2014-9195, CVE-2023-46143) CVSS Vendor Equipment v3 9.8 Hitachi Energy RTU500 series CMU Firmware 5 Vulnerabilities Missing Authentication for Critical Function, Relative Path Traversal, Missing Authorization, Incorrect Authorization, Download of Code Without Integrity Check Background Critical Infrastructure Sectors: Energy Countries\u002FAreas Deployed: Worldwide Company Headquarters Location: Switzerland Vulnerabilities Expand All + CVE-2026-8065 An authentication bypass vulnerability in the firmware update endpoint of Hitachi Energy RTU500 allows an unauthenticated attacker to upload arbitrary firmware through a crafted POST request. Successful exploitation could allow the attacker to modify device functionality or compromise the integrity or availability of the device. Read More 1 Affected Product RTU500 series CMU Firmware versions 11.x and prior (End-of-Life) Product Status: known_affected Remediations Vendor fix Upgrade to version 12.7.8 or 13.9.1 or latest Additional Metrics Relevant CWE: CWE-306 Missing Authentication for Critical Function CVSS Version Base Score Base Severity Vector String 3.1 9.1 CRITICAL CVSS:3.1\u002FAV:N\u002FAC:L\u002FPR:N\u002FUI:N\u002FS:U\u002FC:N\u002FI:H\u002FA:H View CVE Details CVE-2026-8066 A directory traversal vulnerability in the file upload functionality of Hitachi Energy RTU500 allows an unauthenticated attacker to write or overwrite arbitrary files on the device file system. Depending on the files affected, successful exploitation could result in unauthorized modification of device data or disruption of the device’s intended operation. Read More 2 Affected Products RTU500 series CMU Firmware versions 11.x and prior (End-of-Life) Product Status: known_affected Remediations Vendor fix Upgrade to version 12.7.8 or 13.9.1 or latest RTU500 series CMU Firmware versions 11.x and prior (End-of-Life) Product Status: known_affected Remediations Vendor fix Upgrade to version 12.7.8 or 13.9.1 or latest Additional Metrics Relevant CWE: CWE-23 Relative Path Traversal CVSS Version Base Score Base Severity Vector String 3.1 9.1 CRITICAL CVSS:3.1\u002FAV:N\u002FAC:L\u002FPR:N\u002FUI:N\u002FS:U\u002FC:N\u002FI:H\u002FA:H View CVE Details CVE-2026-8067 An improper authorization vulnerability in the RTU500’s web application allows an authenticated user to trigger the RTU500 to reboot through the reset endpoint. Successful exploitation could cause temporary device unavailability and disruption of its intended operation. Read More 3 Affected Products RTU500 series CMU Firmware versions 11.x and prior (End-of-Life) Product Status: known_affected Remediations Vendor fix Upgrade to version 12.7.8 or 13.9.1 or latest RTU500 series CMU Firmware versions 11.x and prior (End-of-Life) Product Status: known_affected Remediations Vendor fix Upgrade to version 12.7.8 or 13.9.1 or latest RTU500 series CMU Firmware versions 11.x and prior (End-of-Life) Product Status: known_affected Remediations Vendor fix Upgrade to version 12.7.8 or 13.9.1 or latest Additional Metrics Relevant CWE: CWE-862 Missing Authorization CVSS Version Base Score Base Severity Vector String 3.1 6.5 MEDIUM CVSS:3.1\u002FAV:N\u002FAC:L\u002FPR:L\u002FUI:N\u002FS:U\u002FC:N\u002FI:N\u002FA:H View CVE Details CVE-2010-2965 The WDB target agent debug service in Wind River VxWorks 6.x, 5.x, and earlier, as used on few of the Hitachi Energy RTU500 CMU firmware legacy versions, allows remote attackers to read or modify arbitrary memory locations, perform function calls, or manage tasks via requests to UDP port 17185. Read More 4 Affected Products RTU500 series CMU Firmware versions 11.x and prior (End-of-Life) Product Status: known_affected Remediations Vendor fix Upgrade to version 12.7.8 or 13.9.1 or latest RTU500 series CMU Firmware versions 11.x and prior (End-of-Life) Product Status: known_affected Remediations Vendor fix Upgrade to version 12.7.8 or 13.9.1 or latest RTU500 series CMU Firmware versions 11.x and prior (End-of-Life) Product Status: known_affected Remediations Vendor fix Upgrade to version 12.7.8 or 13.9.1 or latest RTU500 series CMU Firmware versions 11.x and prior (End-of-Life) Product Status: known_affected Remediations Vendor fix Upgrade to version 12.7.8 or 13.9.1 or latest Additional Metrics Relevant CWE: CWE-863 Incorrect Authorization CVSS Version Base Score Base Severity Vector String 3.1 9.8 CRITICAL CVSS:3.1\u002FAV:N\u002FAC:L\u002FPR:N\u002FUI:N\u002FS:U\u002FC:H\u002FI:H\u002FA:H View CVE Details CVE-2014-9195 Missing authentication vulnerability in a network service of Hitachi Energy RTU500 allows an unauthenticated remote attacker to execute arbitrary commands using protocol-compliant network traffic. Successful exploitation could result in unauthorized modification of the device or disruption of its intended operation. Read More 5 Affected Products RTU500 series CMU Firmware versions 11.x and prior (End-of-Life) Product Status: known_affected Remediations Vendor fix Upgrade to version 12.7.8 or 13.9.1 or latest RTU500 series CMU Firmware versions 11.x and prior (End-of-Life) Product Status: known_affected Remediations Vendor fix Upgrade to version 12.7.8 or 13.9.1 or latest RTU500 series CMU Firmware versions 11.x and prior (End-of-Life) Product Status: known_affected Remediations Vendor fix Upgrade to version 12.7.8 or 13.9.1 or latest RTU500 series CMU Firmware versions 11.x and prior (End-of-Life) Product Status: known_affected Remediations Vendor fix Upgrade to version 12.7.8 or 13.9.1 or latest RTU500 series CMU Firmware versions 11.x and prior (End-of-Life) Product Status: known_affected Remediations Vendor fix Upgrade to version 12.7.8 or 13.9.1 or latest Additional Metrics Relevant CWE: CWE-306 Missing Authentication for Critical Function CVSS Version Base Score Base Severity Vector String 3.1 8.1 HIGH CVSS:3.1\u002FAV:N\u002FAC:H\u002FPR:N\u002FUI:N\u002FS:U\u002FC:H\u002FI:H\u002FA:H View CVE Details CVE-2023-46143 A download of code without integrity check vulnerability in Hitachi Energy RTU500 allows an unauthenticated remote attacker to modify some or all applications running on the device. Successful exploitation could result in unauthorized modification of device functionality or disruption of its intended operation. Read More 6 Affected Products RTU500 series CMU Firmware versions 11.x and prior (End-of-Life) Product Status: known_affected Remediations Vendor fix Upgrade to version 12.7.8 or 13.9.1 or latest RTU500 series CMU Firmware versions 11.x and prior (End-of-Life) Product Status: known_affected Remediations Vendor fix Upgrade to version 12.7.8 or 13.9.1 or latest RTU500 series CMU Firmware versions 11.x and prior (End-of-Life) Product Status: known_affected Remediations Vendor fix Upgrade to version 12.7.8 or 13.9.1 or latest RTU500 series CMU Firmware versions 11.x and prior (End-of-Life) Product Status: known_affected Remediations Vendor fix Upgrade to version 12.7.8 or 13.9.1 or latest RTU500 series CMU Firmware versions 11.x and prior (End-of-Life) Product Status: known_affected Remediations Vendor fix Upgrade to version 12.7.8 or 13.9.1 or latest RTU500 series CMU Firmware versions 11.x and prior (End-of-Life) Product Status: known_affected Remediations Vendor fix Upgrade to version 12.7.8 or 13.9.1 or latest Additional Metrics Relevant CWE: CWE-494 Download of Code Without Integrity Check CVSS Version Base Score Base Severity Vector String 3.1 7.5 HIGH CVSS:3.1\u002FAV:N\u002FAC:L\u002FPR:N\u002FUI:N\u002FS:U\u002FC:N\u002FI:H\u002FA:N View CVE Details Acknowledgments Dragos reported these vulnerabilities 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:\u002F\u002Fwww.hitachienergy.com\u002Fcontact-us\u002F for Hitachi Energy contact-centers. General Mitigation Factors 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. Proper password policies and processes should be followed. Additional information on Industrial Control Systems Cybersecurity Best Practices can be found in the Hitachi Energy “Industrial Control Systems Cybersecurity Best Practices” Cybersecurity Notification. [1] SSVC SSVCv2\u002FE:N\u002FA:N\u002F2026-09-28T14:38:32Z\u002F Legal Notice and Terms of Use This product is provided subject to this Notification (https:\u002F\u002Fwww.cisa.gov\u002Fnotification) and this Privacy & Use policy (https:\u002F\u002Fwww.cisa.gov\u002Fprivacy-policy). Recommended Practices CISA recommends users take defensive measures to minimize the exploitation risk of this vulnerability. Minimize network exposure for all control system devices and\u002For 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 8DBD000251 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: 2026-09-29 Date Revision Summary 2026-09-29 1 Initial public release 2026-10-06 2 Initial CISA Republication of Hitachi Energy PSIRT 8DBD000251 advisory Legal Notice and Terms of Use","Hitachi Energy has issued a cybersecurity advisory detailing multiple vulnerabilities in end-of-life RTU500 CMU firmware versions 11.x and prior. These vulnerabilities, reported by Dragos, include authentication bypass, directory traversal, and improper authorization, with CVSS scores up to 9.8. Exploitation could lead to device compromise, data modification, or service disruption. Hitachi Energy strongly recommends upgrading to supported firmware versions.","Hitachi Energy RTU500 firmware versions \u003C=11.x affected by multiple critical vulnerabilities.","ICS Advisory Hitachi Energy RTU500 Release DateOctober 06, 2026 Alert CodeICSA-26-279-06 Related topics: Industrial Control System Vulnerabilities , Industrial Control Systems View CSAF Summary Hitachi Energy is publishing this cybersecurity advisory in response to the security findings reported by Dragos affecting end-of-life RTU500 CMU firmware version 9.x. The reported findings are associated with legacy RTU500 firmware versions that were developed according to the cybersecurity requirements, threat landscape, and industry practices that existed at the time of their release. As cybersecurity threats and security expectations have evolved, these end-of-life versions no longer incorporate many of the security controls and hardening measures that are standard in modern industrial control systems. Over successive RTU500 releases, Hitachi Energy has continuously enhanced the security of the product through the introduction of additional security features, protocol hardening, stronger authentication and access controls, encrypted communications, and other security-by-design improvements. While the findings reported by Dragos do not affect currently supported RTU500 CMU firmware versions, there is a likelihood that the end-of-life versions 11.x and prior are affected by these vulnerabilities. Since the end-of-life versions are no longer maintained with security updates, Hitachi Energy strongly recommends upgrading to a currently supported RTU500 firmware version. Customers should also implement appropriate defense-in-depth measures and cybersecurity best practices to reduce risk and strengthen the security posture of their operational environments. Please refer to the Recommended Immediate Actions for information about the mitigation\u002Fremediation. The following versions of Hitachi Energy RTU500 are affected: RTU500 series CMU Firmware vers:RTU500_series_CMU_Firmware\u002F\u003C=11.x (CVE-2026-8065, CVE-2026-8066, CVE-2026-8067, CVE-2010-2965, CVE-2014-9195, CVE-2023-46143) CVSS Vendor Equipment v3 9.8 Hitachi Energy RTU500 series CMU Firmware 5 Vulnerabilities Missing Authentication for Critical Function, Relative Path Traversal, Missing Authorization, Incorrect Authorization, Download of Code Without Integrity Check Background Critical Infrastructure Sectors: Energy Countries\u002FAreas Deployed: Worldwide Company Headquarters Location: Switzerland Vulnerabilities Expand All + CVE-2026-8065 An authentication bypass vulnerability in the firmware update endpoint of Hitachi Energy RTU500 allows an unauthenticated attacker to upload arbitrary firmware through a crafted POST request. Successful exploitation could allow the attacker to modify device functionality or compromise the integrity or availability of the device. Read More 1 Affected Product RTU500 series CMU Firmware versions 11.x and prior (End-of-Life) Product Status: known_affected Remediations Vendor fixUpgrade to version 12.7.8 or 13.9.1 or latest Additional Metrics Relevant CWE: CWE-306 Missing Authentication for Critical Function CVSS Version Base Score Base Severity Vector String 3.1 9.1 CRITICAL CVSS:3.1\u002FAV:N\u002FAC:L\u002FPR:N\u002FUI:N\u002FS:U\u002FC:N\u002FI:H\u002FA:H View CVE Details CVE-2026-8066 A directory traversal vulnerability in the file upload functionality of Hitachi Energy RTU500 allows an unauthenticated attacker to write or overwrite arbitrary files on the device file system. Depending on the files affected, successful exploitation could result in unauthorized modification of device data or disruption of the device’s intended operation. Read More 2 Affected Products RTU500 series CMU Firmware versions 11.x and prior (End-of-Life) Product Status: known_affected Remediations Vendor fixUpgrade to version 12.7.8 or 13.9.1 or latest RTU500 series CMU Firmware versions 11.x and prior (End-of-Life) Product Status: known_affected Remediations Vendor fixUpgrade to version 12.7.8 or 13.9.1 or latest Additional Metrics Relevant CWE: CWE-23 Relative Path Traversal CVSS Version Base Score Base Severity Vector String 3.1 9.1 CRITICAL CVSS:3.1\u002FAV:N\u002FAC:L\u002FPR:N\u002FUI:N\u002FS:U\u002FC:N\u002FI:H\u002FA:H View CVE Details CVE-2026-8067 An improper authorization vulnerability in the RTU500’s web application allows an authenticated user to trigger the RTU500 to reboot through the reset endpoint. Successful exploitation could cause temporary device unavailability and disruption of its intended operation. Read More 3 Affected Products RTU500 series CMU Firmware versions 11.x and prior (End-of-Life) Product Status: known_affected Remediations Vendor fixUpgrade to version 12.7.8 or 13.9.1 or latest RTU500 series CMU Firmware versions 11.x and prior (End-of-Life) Product Status: known_affected Remediations Vendor fixUpgrade to version 12.7.8 or 13.9.1 or latest RTU500 series CMU Firmware versions 11.x and prior (End-of-Life) Product Status: known_affected Remediations Vendor fixUpgrade to version 12.7.8 or 13.9.1 or latest Additional Metrics Relevant CWE: CWE-862 Missing Authorization CVSS Version Base Score Base Severity Vector String 3.1 6.5 MEDIUM CVSS:3.1\u002FAV:N\u002FAC:L\u002FPR:L\u002FUI:N\u002FS:U\u002FC:N\u002FI:N\u002FA:H View CVE Details CVE-2010-2965 The WDB target agent debug service in Wind River VxWorks 6.x, 5.x, and earlier, as used on few of the Hitachi Energy RTU500 CMU firmware legacy versions, allows remote attackers to read or modify arbitrary memory locations, perform function calls, or manage tasks via requests to UDP port 17185. Read More 4 Affected Products RTU500 series CMU Firmware versions 11.x and prior (End-of-Life) Product Status: known_affected Remediations Vendor fixUpgrade to version 12.7.8 or 13.9.1 or latest RTU500 series CMU Firmware versions 11.x and prior (End-of-Life) Product Status: known_affected Remediations Vendor fixUpgrade to version 12.7.8 or 13.9.1 or latest RTU500 series CMU Firmware versions 11.x and prior (End-of-Life) Product Status: known_affected Remediations Vendor fixUpgrade to version 12.7.8 or 13.9.1 or latest RTU500 series CMU Firmware versions 11.x and prior (End-of-Life) Product Status: known_affected Remediations Vendor fixUpgrade to version 12.7.8 or 13.9.1 or latest Additional Metrics Relevant CWE: CWE-863 Incorrect Authorization CVSS Version Base Score Base Severity Vector String 3.1 9.8 CRITICAL CVSS:3.1\u002FAV:N\u002FAC:L\u002FPR:N\u002FUI:N\u002FS:U\u002FC:H\u002FI:H\u002FA:H View CVE Details CVE-2014-9195 Missing authentication vulnerability in a network service of Hitachi Energy RTU500 allows an unauthenticated remote attacker to execute arbitrary commands using protocol-compliant network traffic. Successful exploitation could result in unauthorized modification of the device or disruption of its intended operation. Read More 5 Affected Products RTU500 series CMU Firmware versions 11.x and prior (End-of-Life) Product Status: known_affected Remediations Vendor fixUpgrade to version 12.7.8 or 13.9.1 or latest RTU500 series CMU Firmware versions 11.x and prior (End-of-Life) Product Status: known_affected Remediations Vendor fixUpgrade to version 12.7.8 or 13.9.1 or latest RTU500 series CMU Firmware versions 11.x and prior (End-of-Life) Product Status: known_affected Remediations Vendor fixUpgrade to version 12.7.8 or 13.9.1 or latest RTU500 series CMU Firmware versions 11.x and prior (End-of-Life) Product Status: known_affected Remediations Vendor fixUpgrade to version 12.7.8 or 13.9.1 or latest RTU500 series CMU Firmware versions 11.x and prior (End-of-Life) Product Status: known_affected Remediations Vendor fixUpgrade to version 12.7.8 or 13.9.1 or latest Additional Metrics Relevant CWE: CWE-306 Missing Authentication for Critical Function CVSS Version Base Score Base Severity Vector String 3.1 8.1 HIGH CVSS:3.1\u002FAV:N\u002FAC:H\u002FPR:N\u002FUI:N\u002FS:U\u002FC:H\u002FI:H\u002FA:H View CVE Details CVE-2023-46143 A download of code without integrity check vulnerability in Hitachi Energy RTU500 allows an unauthenticated remote attacker to modify some or all applications running on the device. Successful exploitation could result in unauthorized modification of device functionality or disruption of its intended o","https:\u002F\u002Fwww.cisa.gov\u002Fnews-events\u002Fics-advisories\u002Ficsa-26-279-06",null,"2026-10-06T12:00:00+00:00","2026-10-06T18:00:11.996131+00:00",9,[18,21,24,27],{"name":19,"type":20},"RTU500 CMU Firmware","product",{"name":22,"type":23},"Hitachi Energy","vendor",{"name":25,"type":26},"Dragos","threat_actor",{"name":28,"type":29},"Industrial Control Systems","technology","80544778-fabb-4dcd-aa35-17492e5dcf4f",{"id":30,"icon":13,"name":32,"slug":33},"Vulnerabilities","vulnerabilities",[35,40,42,47],{"category":36},{"id":37,"icon":13,"name":38,"slug":39},"26b0b636-0e31-4db1-bffb-61bdf9f20a58","Supply Chain","supply-chain",{"category":41},{"id":30,"icon":13,"name":32,"slug":33},{"category":43},{"id":44,"icon":13,"name":45,"slug":46},"d6f63bb8-0801-486a-be7f-171400700454","IoT\u002FOT","iot-ot",{"category":48},{"id":49,"icon":13,"name":50,"slug":51},"e7b231c8-5f79-4465-8d38-1ef13aea5a14","Threat Intelligence","threat-intelligence",[53,57,60,63,66,69],{"type":54,"value":55,"context":56},"cve","CVE-2026-8065","Authentication bypass vulnerability in firmware update endpoint.",{"type":54,"value":58,"context":59},"CVE-2026-8066","Directory traversal vulnerability in file upload functionality.",{"type":54,"value":61,"context":62},"CVE-2026-8067","Improper authorization vulnerability allowing device reboot.",{"type":54,"value":64,"context":65},"CVE-2010-2965","VxWorks WDB target agent debug service vulnerability allowing arbitrary memory access.",{"type":54,"value":67,"context":68},"CVE-2014-9195","Missing authentication vulnerability allowing arbitrary command execution.",{"type":54,"value":70,"context":71},"CVE-2023-46143","Download of code without integrity check vulnerability."]