[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fwZrxml_fJTOSyZ72a61en5ey2Mv9QR5C31a02fYWeok":3},{"article":4,"iocs":41},{"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":31,"category":32,"article_tags":35},"528e03be-31d2-4e5b-bd04-1e19300b9e7e","Hitachi Energy RTU500","hitachi-energy-rtu500-235443","View CSAF Summary Hitachi Energy is aware of vulnerabilities that affect RTU500 product versions listed in this document. If exploited, these vulnerabilities primarily impact product availability, with potential secondary impacts on confidentiality and integrity. 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>=12.7.1| =13.5.1| =13.6.1| =13.7.1| =13.7.1|\u003C=13.7.7 (CVE-2025-69421, CVE-2026-24515, CVE-2026-25210, CVE-2026-32776, CVE-2026-32777, CVE-2026-32778, CVE-2026-8479, CVE-2025-69421, CVE-2026-24515, CVE-2026-25210, CVE-2026-32776, CVE-2026-32777, CVE-2026-32778, CVE-2026-8479, CVE-2025-69421, CVE-2026-24515, CVE-2026-25210, CVE-2026-32776, CVE-2026-32777, CVE-2026-32778, CVE-2026-8479, CVE-2025-69421, CVE-2026-24515, CVE-2026-25210, CVE-2026-32776, CVE-2026-32777, CVE-2026-32778, CVE-2025-69421, CVE-2026-24515, CVE-2026-25210, CVE-2026-32776, CVE-2026-32777, CVE-2026-32778, CVE-2026-8479, CVE-2026-8479) CVSS Vendor Equipment Vulnerabilities v3 7.8 Hitachi Energy Hitachi Energy RTU500 NULL Pointer Dereference, Integer Overflow or Wraparound, Loop with Unreachable Exit Condition ('Infinite Loop') Background Critical Infrastructure Sectors: Dams, Energy, Water and Wastewater Countries\u002FAreas Deployed: Worldwide Company Headquarters Location: Switzerland Vulnerabilities Expand All + CVE-2025-69421 CWE-476: NULL Pointer Dereference. Issue summary: Processing a malformed PKCS#12 file can trigger a NULL pointer dereference in the PKCS12_item_decrypt_d2i_ex() function. Impact summary: A NULL pointer dereference can trigger a crash which leads to Denial of Service for an application processing PKCS#12 files. The PKCS12_item_decrypt_d2i_ex() function does not check whether the oct parameter is NULL before dereferencing it. When called from PKCS12_unpack_p7encdata() with a malformed PKCS#12 file, this parameter can be NULL, causing Denial of Service impact. The vulnerability is limited to Denial of Service and cannot be escalated to achieve code execution or memory disclosure. Product is affected, if a privileged user uploads a malformed PKCS#12 certificate via web interface or if PKI client functionality is configured. View CVE Details Affected Products Hitachi Energy RTU500 Vendor: Hitachi Energy Product Version: RTU500 series CMU Firmware version 12.7.1 – 12.7.7, RTU500 series CMU Firmware version 13.5.1 – 13.5.4, RTU500 series CMU Firmware version 13.6.1 – 13.6.3, RTU500 series CMU Firmware version 13.7.1 – 13.7.8, RTU500 series CMU Firmware version 13.8.1 Product Status: known_affected Remediations Vendor fix Update to CMU Firmware version 13.8.2 Mitigation Follow general mitigation factors\u002Fworkarounds Vendor fix Update to CMU Firmware version 13.7.9 (when available) or 13.8.2 Relevant CWE: CWE-476 NULL Pointer Dereference Metrics 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 CVE-2026-24515 CWE-476: NULL Pointer Dereference. In libexpat before 2.7.4, XML_ExternalEntityParserCreate does not copy unknown encoding handler user data, causing Denial of Service impact. Product is only affected if IEC 61850 functionality is configured. View CVE Details Affected Products Hitachi Energy RTU500 Vendor: Hitachi Energy Product Version: RTU500 series CMU Firmware version 12.7.1 – 12.7.7, RTU500 series CMU Firmware version 13.5.1 – 13.5.4, RTU500 series CMU Firmware version 13.6.1 – 13.6.3, RTU500 series CMU Firmware version 13.7.1 – 13.7.8, RTU500 series CMU Firmware version 13.8.1 Product Status: known_affected Remediations Vendor fix Update to CMU Firmware version 13.8.2 Mitigation Follow general mitigation factors\u002Fworkarounds Vendor fix Update to CMU Firmware version 13.7.9 (when available) or 13.8.2 Relevant CWE: CWE-476 NULL Pointer Dereference Metrics CVSS Version Base Score Base Severity Vector String 3.1 2.5 LOW CVSS:3.1\u002FAV:L\u002FAC:H\u002FPR:L\u002FUI:N\u002FS:U\u002FC:N\u002FI:N\u002FA:L CVE-2026-25210 CWE-190: Integer Overflow or Wraparound. In libexpat before 2.7.4, the doContent function does not properly determine the buffer size bufSize because there is no integer overflow check for tag buffer reallocation, primarily causing Denial of Service and potentially confidentiality and integrity impact to the product. Product is only affected if IEC 61850 functionality is configured. View CVE Details Affected Products Hitachi Energy RTU500 Vendor: Hitachi Energy Product Version: RTU500 series CMU Firmware version 12.7.1 – 12.7.7, RTU500 series CMU Firmware version 13.5.1 – 13.5.4, RTU500 series CMU Firmware version 13.6.1 – 13.6.3, RTU500 series CMU Firmware version 13.7.1 – 13.7.8, RTU500 series CMU Firmware version 13.8.1 Product Status: known_affected Remediations Vendor fix Update to CMU Firmware version 13.8.2 Mitigation Follow general mitigation factors\u002Fworkarounds Vendor fix Update to CMU Firmware version 13.7.9 (when available) or 13.8.2 Relevant CWE: CWE-190 Integer Overflow or Wraparound Metrics CVSS Version Base Score Base Severity Vector String 3.1 7.8 HIGH CVSS:3.1\u002FAV:L\u002FAC:L\u002FPR:L\u002FUI:N\u002FS:U\u002FC:H\u002FI:H\u002FA:H CVE-2026-32776 CWE-476: NULL Pointer Dereference. libexpat before 2.7.5 allows a NULL pointer dereference with empty external parameter entity content, causing Denial of Service impact. Product is only affected if IEC 61850 functionality is configured. View CVE Details Affected Products Hitachi Energy RTU500 Vendor: Hitachi Energy Product Version: RTU500 series CMU Firmware version 12.7.1 – 12.7.7, RTU500 series CMU Firmware version 13.5.1 – 13.5.4, RTU500 series CMU Firmware version 13.6.1 – 13.6.3, RTU500 series CMU Firmware version 13.7.1 – 13.7.8, RTU500 series CMU Firmware version 13.8.1 Product Status: known_affected Remediations Vendor fix Update to CMU Firmware version 13.8.2 Mitigation Follow general mitigation factors\u002Fworkarounds Vendor fix Update to CMU Firmware version 13.7.9 (when available) or 13.8.2 Relevant CWE: CWE-476 NULL Pointer Dereference Metrics CVSS Version Base Score Base Severity Vector String 3.1 5.5 MEDIUM CVSS:3.1\u002FAV:L\u002FAC:L\u002FPR:L\u002FUI:N\u002FS:U\u002FC:N\u002FI:N\u002FA:H CVE-2026-32777 CWE-835: Loop with Unreachable Exit Condition ('Infinite Loop'). libexpat before 2.7.5 allows an infinite loop while parsing DTD content, causing Denial of Service impact. Product is only affected if IEC 61850 functionality is configured. View CVE Details Affected Products Hitachi Energy RTU500 Vendor: Hitachi Energy Product Version: RTU500 series CMU Firmware version 12.7.1 – 12.7.7, RTU500 series CMU Firmware version 13.5.1 – 13.5.4, RTU500 series CMU Firmware version 13.6.1 – 13.6.3, RTU500 series CMU Firmware version 13.7.1 – 13.7.8, RTU500 series CMU Firmware version 13.8.1 Product Status: known_affected Remediations Vendor fix Update to CMU Firmware version 13.8.2 Mitigation Follow general mitigation factors\u002Fworkarounds Vendor fix Update to CMU Firmware version 13.7.9 (when available) or 13.8.2 Relevant CWE: CWE-835 Loop with Unreachable Exit Condition ('Infinite Loop') Metrics CVSS Version Base Score Base Severity Vector String 3.1 5.5 MEDIUM CVSS:3.1\u002FAV:L\u002FAC:L\u002FPR:L\u002FUI:N\u002FS:U\u002FC:N\u002FI:N\u002FA:H CVE-2026-32778 CWE-476: NULL Pointer Dereference. libexpat before 2.7.5 allows a NULL pointer dereference in the function setContext on retry after an earlier out-of-memory condition, causing Denial of Service impact. Product is only affected if IEC 61850 functionality is configured. View CVE Details Affected Products Hitachi Energy RTU500 Vendor: Hitachi Energy Product Version: RTU500 series CMU Firmware version 12.7.1 – 12.7.7, RTU500 series CMU Firmware version 13.5.1 – 13.5.4, RTU500 series CMU Firmware version 13.6.1 – 13.6.3, RTU500 series CMU Firmware version 13.7.1 – 13.7.8, RTU500 series CMU Firmware version 13.8.1 Product Status: known_affected Remediations Vendor fix Update to CMU Firmware version 13.8.2 Mitigation Follow general mitigation factors\u002Fworkarounds Vendor fix Update to CMU Firmware version 13.7.9 (when available) or 13.8.2 Relevant CWE: CWE-476 NULL Pointer Dereference Metrics CVSS Version Base Score Base Severity Vector String 3.1 5.5 MEDIUM CVSS:3.1\u002FAV:L\u002FAC:L\u002FPR:L\u002FUI:N\u002FS:U\u002FC:N\u002FI:N\u002FA:H CVE-2026-8479 CWE-476: NULL Pointer Dereference. IEC 60870-5-104 used in bidirectional mode is vulnerable for a NULL pointer dereferencing, if a specially crafted sequence of messages is sent for a certain time, causing Denial of Service impact. Product is only affected if IEC 60870-5-104 functionality in bidirectional mode (BCI) is configured. View CVE Details Affected Products Hitachi Energy RTU500 Vendor: Hitachi Energy Product Version: RTU500 series CMU Firmware version 12.7.1 – 12.7.7, RTU500 series CMU Firmware version 13.5.1 – 13.5.4, RTU500 series CMU Firmware version 13.6.1 – 13.6.3, RTU500 series CMU Firmware version 13.7.1 – 13.7.7, RTU500 series CMU Firmware version 13.8.1 Product Status: known_affected Remediations Vendor fix Update to CMU Firmware version 13.8.2 Mitigation Follow general mitigation factors\u002Fworkarounds Vendor fix Update to CMU Firmware version 13.7.8 Relevant CWE: CWE-476 NULL Pointer Dereference Metrics CVSS Version Base Score Base Severity Vector String 3.1 6.5 MEDIUM CVSS:3.1\u002FAV:A\u002FAC:L\u002FPR:N\u002FUI:N\u002FS:U\u002FC:N\u002FI:N\u002FA:H 4.0 6.9 MEDIUM CVSS:4.0\u002FAV:A\u002FAC:L\u002FAT:N\u002FPR:L\u002FUI:N\u002FVC:N\u002FVI:N\u002FVA:H\u002FSC:N\u002FSI:N\u002FSA:N Acknowledgments Hitachi Energy Internal Team 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:\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 following Hitachi Energy Cybersecurity Notification. Cybersecurity Advisory - Industrial Control Systems Cybersecurity Best Practices SSVC SSVCv2\u002FE:N\u002FA:N\u002F2026-05-26T08:50:36Z\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 8DBD000252 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: 2026-05-26 Date Revision Summary 2026-05-26 1 Initial public release 2026-06-04 2 Initial CISA Republication of Hitachi Energy PSIRT 8DBD000252 advisory Legal Notice and Terms of Use","Hitachi Energy has disclosed seven vulnerabilities affecting RTU500 Remote Terminal Unit firmware versions 12.7.1 through 13.8.1, used in critical infrastructure (dams, energy, water systems) worldwide. The vulnerabilities include NULL pointer dereferences, integer overflow, and infinite loop conditions in libexpat and PKCS#12 processing, primarily impacting availability with potential secondary impacts on confidentiality and integrity. Affected organizations should update to CMU Firmware version 13.8.2 or 13.7.9 to remediate the issues.","Hitachi Energy RTU500 firmware versions contain seven CVEs causing denial of service in critical infrastructure","ICS Advisory Hitachi Energy RTU500 Release DateJune 04, 2026 Alert CodeICSA-26-155-04 Related topics: Industrial Control System Vulnerabilities , Industrial Control Systems View CSAF Summary Hitachi Energy is aware of vulnerabilities that affect RTU500 product versions listed in this document. If exploited, these vulnerabilities primarily impact product availability, with potential secondary impacts on confidentiality and integrity. 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>=12.7.1|\u003C=12.7.7, vers:RTU500_series_CMU_Firmware\u002F>=13.5.1|\u003C=13.5.4, vers:RTU500_series_CMU_Firmware\u002F>=13.6.1|\u003C=13.6.3, vers:RTU500_series_CMU_Firmware\u002F>=13.7.1|\u003C=13.7.8, 13.8.1, vers:RTU500_series_CMU_Firmware\u002F>=13.7.1|\u003C=13.7.7 (CVE-2025-69421, CVE-2026-24515, CVE-2026-25210, CVE-2026-32776, CVE-2026-32777, CVE-2026-32778, CVE-2026-8479, CVE-2025-69421, CVE-2026-24515, CVE-2026-25210, CVE-2026-32776, CVE-2026-32777, CVE-2026-32778, CVE-2026-8479, CVE-2025-69421, CVE-2026-24515, CVE-2026-25210, CVE-2026-32776, CVE-2026-32777, CVE-2026-32778, CVE-2026-8479, CVE-2025-69421, CVE-2026-24515, CVE-2026-25210, CVE-2026-32776, CVE-2026-32777, CVE-2026-32778, CVE-2025-69421, CVE-2026-24515, CVE-2026-25210, CVE-2026-32776, CVE-2026-32777, CVE-2026-32778, CVE-2026-8479, CVE-2026-8479) CVSS Vendor Equipment Vulnerabilities v3 7.8 Hitachi Energy Hitachi Energy RTU500 NULL Pointer Dereference, Integer Overflow or Wraparound, Loop with Unreachable Exit Condition ('Infinite Loop') Background Critical Infrastructure Sectors: Dams, Energy, Water and Wastewater Countries\u002FAreas Deployed: Worldwide Company Headquarters Location: Switzerland Vulnerabilities Expand All + CVE-2025-69421 CWE-476: NULL Pointer Dereference. Issue summary: Processing a malformed PKCS#12 file can trigger a NULL pointer dereference in the PKCS12_item_decrypt_d2i_ex() function. Impact summary: A NULL pointer dereference can trigger a crash which leads to Denial of Service for an application processing PKCS#12 files. The PKCS12_item_decrypt_d2i_ex() function does not check whether the oct parameter is NULL before dereferencing it. When called from PKCS12_unpack_p7encdata() with a malformed PKCS#12 file, this parameter can be NULL, causing Denial of Service impact. The vulnerability is limited to Denial of Service and cannot be escalated to achieve code execution or memory disclosure. Product is affected, if a privileged user uploads a malformed PKCS#12 certificate via web interface or if PKI client functionality is configured. View CVE Details Affected Products Hitachi Energy RTU500 Vendor:Hitachi Energy Product Version:RTU500 series CMU Firmware version 12.7.1 – 12.7.7, RTU500 series CMU Firmware version 13.5.1 – 13.5.4, RTU500 series CMU Firmware version 13.6.1 – 13.6.3, RTU500 series CMU Firmware version 13.7.1 – 13.7.8, RTU500 series CMU Firmware version 13.8.1 Product Status:known_affected Remediations Vendor fixUpdate to CMU Firmware version 13.8.2 MitigationFollow general mitigation factors\u002Fworkarounds Vendor fixUpdate to CMU Firmware version 13.7.9 (when available) or 13.8.2 Relevant CWE: CWE-476 NULL Pointer Dereference Metrics 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 CVE-2026-24515 CWE-476: NULL Pointer Dereference. In libexpat before 2.7.4, XML_ExternalEntityParserCreate does not copy unknown encoding handler user data, causing Denial of Service impact. Product is only affected if IEC 61850 functionality is configured. View CVE Details Affected Products Hitachi Energy RTU500 Vendor:Hitachi Energy Product Version:RTU500 series CMU Firmware version 12.7.1 – 12.7.7, RTU500 series CMU Firmware version 13.5.1 – 13.5.4, RTU500 series CMU Firmware version 13.6.1 – 13.6.3, RTU500 series CMU Firmware version 13.7.1 – 13.7.8, RTU500 series CMU Firmware version 13.8.1 Product Status:known_affected Remediations Vendor fixUpdate to CMU Firmware version 13.8.2 MitigationFollow general mitigation factors\u002Fworkarounds Vendor fixUpdate to CMU Firmware version 13.7.9 (when available) or 13.8.2 Relevant CWE: CWE-476 NULL Pointer Dereference Metrics CVSS Version Base Score Base Severity Vector String 3.1 2.5 LOW CVSS:3.1\u002FAV:L\u002FAC:H\u002FPR:L\u002FUI:N\u002FS:U\u002FC:N\u002FI:N\u002FA:L CVE-2026-25210 CWE-190: Integer Overflow or Wraparound. In libexpat before 2.7.4, the doContent function does not properly determine the buffer size bufSize because there is no integer overflow check for tag buffer reallocation, primarily causing Denial of Service and potentially confidentiality and integrity impact to the product. Product is only affected if IEC 61850 functionality is configured. View CVE Details Affected Products Hitachi Energy RTU500 Vendor:Hitachi Energy Product Version:RTU500 series CMU Firmware version 12.7.1 – 12.7.7, RTU500 series CMU Firmware version 13.5.1 – 13.5.4, RTU500 series CMU Firmware version 13.6.1 – 13.6.3, RTU500 series CMU Firmware version 13.7.1 – 13.7.8, RTU500 series CMU Firmware version 13.8.1 Product Status:known_affected Remediations Vendor fixUpdate to CMU Firmware version 13.8.2 MitigationFollow general mitigation factors\u002Fworkarounds Vendor fixUpdate to CMU Firmware version 13.7.9 (when available) or 13.8.2 Relevant CWE: CWE-190 Integer Overflow or Wraparound Metrics CVSS Version Base Score Base Severity Vector String 3.1 7.8 HIGH CVSS:3.1\u002FAV:L\u002FAC:L\u002FPR:L\u002FUI:N\u002FS:U\u002FC:H\u002FI:H\u002FA:H CVE-2026-32776 CWE-476: NULL Pointer Dereference. libexpat before 2.7.5 allows a NULL pointer dereference with empty external parameter entity content, causing Denial of Service impact. Product is only affected if IEC 61850 functionality is configured. View CVE Details Affected Products Hitachi Energy RTU500 Vendor:Hitachi Energy Product Version:RTU500 series CMU Firmware version 12.7.1 – 12.7.7, RTU500 series CMU Firmware version 13.5.1 – 13.5.4, RTU500 series CMU Firmware version 13.6.1 – 13.6.3, RTU500 series CMU Firmware version 13.7.1 – 13.7.8, RTU500 series CMU Firmware version 13.8.1 Product Status:known_affected Remediations Vendor fixUpdate to CMU Firmware version 13.8.2 MitigationFollow general mitigation factors\u002Fworkarounds Vendor fixUpdate to CMU Firmware version 13.7.9 (when available) or 13.8.2 Relevant CWE: CWE-476 NULL Pointer Dereference Metrics CVSS Version Base Score Base Severity Vector String 3.1 5.5 MEDIUM CVSS:3.1\u002FAV:L\u002FAC:L\u002FPR:L\u002FUI:N\u002FS:U\u002FC:N\u002FI:N\u002FA:H CVE-2026-32777 CWE-835: Loop with Unreachable Exit Condition ('Infinite Loop'). libexpat before 2.7.5 allows an infinite loop while parsing DTD content, causing Denial of Service impact. Product is only affected if IEC 61850 functionality is configured. View CVE Details Affected Products Hitachi Energy RTU500 Vendor:Hitachi Energy Product Version:RTU500 series CMU Firmware version 12.7.1 – 12.7.7, RTU500 series CMU Firmware version 13.5.1 – 13.5.4, RTU500 series CMU Firmware version 13.6.1 – 13.6.3, RTU500 series CMU Firmware version 13.7.1 – 13.7.8, RTU500 series CMU Firmware version 13.8.1 Product Status:known_affected Remediations Vendor fixUpdate to CMU Firmware version 13.8.2 MitigationFollow general mitigation factors\u002Fworkarounds Vendor fixUpdate to CMU Firmware version 13.7.9 (when available) or 13.8.2 Relevant CWE: CWE-835 Loop with Unreachable Exit Condition ('Infinite Loop') Metrics CVSS Version Base Score Base Severity Vector String 3.1 5.5 MEDIUM CVSS:3.1\u002FAV:L\u002FAC:L\u002FPR:L\u002FUI:N\u002FS:U\u002FC:N\u002FI:N\u002FA:H CVE-2026-32778 CWE-476: NULL Pointer Dereference. libexpat before 2.7.5 allows a NULL pointer dereference in the function setContext on retry after an earlier out-of-memory condition, causing Denial of Service impact. Product is only affected if IEC 61850 functionality is configured. View CVE Details Affected Products Hitachi Energy RTU500 Vendor:Hitachi Energy Product Version:RTU500 series CMU Firmware version 12.7.1 – 12.7.7, RTU500 series CMU Firmware v","https:\u002F\u002Fwww.cisa.gov\u002Fnews-events\u002Fics-advisories\u002Ficsa-26-155-04",null,"2026-06-04T12:00:00+00:00","2026-06-04T16:00:26.235992+00:00",9,[18,21,24,26,29],{"name":19,"type":20},"Hitachi Energy","vendor",{"name":22,"type":23},"RTU500","product",{"name":25,"type":23},"libexpat",{"name":27,"type":28},"IEC 61850","technology",{"name":30,"type":28},"IEC 60870-5-104","80544778-fabb-4dcd-aa35-17492e5dcf4f",{"id":31,"icon":13,"name":33,"slug":34},"Vulnerabilities","vulnerabilities",[36],{"category":37},{"id":38,"icon":13,"name":39,"slug":40},"d6f63bb8-0801-486a-be7f-171400700454","IoT\u002FOT","iot-ot",[42,46,49,52,55,58,61],{"type":43,"value":44,"context":45},"cve","CVE-2025-69421","NULL pointer dereference in PKCS12_item_decrypt_d2i_ex() function via malformed PKCS#12 file upload",{"type":43,"value":47,"context":48},"CVE-2026-24515","NULL pointer dereference in libexpat XML_ExternalEntityParserCreate; IEC 61850 functionality",{"type":43,"value":50,"context":51},"CVE-2026-25210","Integer overflow in libexpat doContent function; IEC 61850 functionality; CVSS 7.8 HIGH",{"type":43,"value":53,"context":54},"CVE-2026-32776","NULL pointer dereference with empty external parameter entity in libexpat; IEC 61850",{"type":43,"value":56,"context":57},"CVE-2026-32777","Infinite loop while parsing DTD content in libexpat; IEC 61850 functionality",{"type":43,"value":59,"context":60},"CVE-2026-32778","NULL pointer dereference in libexpat setContext after out-of-memory condition; IEC 61850",{"type":43,"value":62,"context":63},"CVE-2026-8479","NULL pointer dereference in IEC 60870-5-104 bidirectional mode; specially crafted message sequence"]