ICSA-26-293-05
Vulnerability from csaf_cisa - Published: 2026-09-01 00:00 - Updated: 2026-10-20 06:00Summary
Hitachi Energy RTU500 Product
Severity
High
Notes
Summary: Hitachi Energy is aware of vulnerabilities that affect RTU500 product versions listed in this document. These vulnerabilities if exploited can have impact on confidentiality, integrity and availability of the product. Please refer to the Recommended Immediate Actions for information about the mitigation/remediation.
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://www.hitachienergy.com/contact-us/ 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]
Critical infrastructure sectors: Energy
Countries/areas deployed: Worldwide
Company headquarters location: Switzerland
SSVC: SSVCv2/E:N/A:N/2026-09-28T14:29:30Z/
Legal Notice and Terms of Use: This product is provided subject to this Notification (https://www.cisa.gov/notification) and this Privacy & Use policy (https://www.cisa.gov/privacy-policy).
Advisory Conversion Disclaimer: This ICSA is a verbatim republication of Hitachi Energy PSIRT 8DBD000259 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.
Recommended Practices: CISA recommends users take defensive measures to minimize the exploitation risk of this vulnerability.
Recommended Practices: Minimize network exposure for all control system devices and/or systems, and ensure they are not accessible from the internet.
Recommended Practices: Locate control system networks and remote devices behind firewalls and isolate them from business networks.
Recommended Practices: 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.
Recommended Practices: CISA reminds organizations to perform proper impact analysis and risk assessment prior to deploying defensive measures.
Recommended Practices: 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.
Recommended Practices: 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.
Recommended Practices: Organizations observing suspected malicious activity should follow established internal procedures and report findings to CISA for tracking and correlation against other incidents.
RTU500 has a vulnerability, where high-load scenarios, such as sending GI requests at short intervals, may cause a NULL pointer dereference in the last entry of the enhanced message queue. This can cause a BCI_IEC104 fatal write error, resulting in connection interruption and restart, and ultimately a denial of service for bidirectional IEC 60870-5-104 communication.
5.9 (Medium)
Affected products
Known affected
5 products
| Product | Identifier | Version | Remediation |
|---|---|---|---|
|
RTU500 series CMU Firmware version 13.5.1 – 13.5.4
Hitachi Energy / RTU500 series CMU Firmware
|
vers:RTU500_series_CMU_Firmware/>=13.5.1|<=13.5.4 |
Vendor Fix
Mitigation
|
|
|
RTU500 series CMU Firmware version 13.6.1 – 13.6.3
Hitachi Energy / RTU500 series CMU Firmware
|
vers:RTU500_series_CMU_Firmware/>=13.6.1|<=13.6.3 |
Vendor Fix
Mitigation
|
|
|
RTU500 series CMU Firmware version 13.7.1 – 13.7.8
Hitachi Energy / RTU500 series CMU Firmware
|
vers:RTU500_series_CMU_Firmware/>=13.7.1|<=13.7.8 |
Mitigation
Vendor Fix
|
|
|
RTU500 series CMU Firmware version 13.8.1 – 13.8.2
Hitachi Energy / RTU500 series CMU Firmware
|
vers:RTU500_series_CMU_Firmware/>=13.8.1|<=13.8.2 |
Mitigation
Vendor Fix
|
|
|
RTU500 series CMU Firmware version 12.7.1 – 12.7.7
Hitachi Energy / RTU500 series CMU Firmware
|
vers:RTU500_series_CMU_Firmware/>=12.7.1|<=12.7.7 |
Mitigation
Vendor Fix
Vendor Fix
|
A vulnerability exists in OpenSSL library component of RTU500 that is used for secure HTTPS access, authenticating and establishing encrypted communications with other devices. When processing a malformed delta CRL with a Delta CRL Indicator but no required CRL Number extension, OpenSSL may dereference a NULL pointer, causing a Denial of Service during X.509 certificate verification. Exploitation requires delta CRL processing to be enabled, a relevant freshest CRL condition to be present, and an attacker-supplied malformed CRL. The issue is limited to Denial of Service and cannot lead to code execution or memory disclosure.
7.5 (High)
Affected products
Known affected
5 products, the same list as for
CVE-2026-17539
The XML-based services used in RTU500 has a vulnerability while processing a specially crafted XSD-validated XML document may trigger a type confusion error in libxml2. An attacker could exploit this condition to cause a denial of service.
7.5 (High)
Affected products
Known affected
4 products
| Product | Identifier | Version | Remediation |
|---|---|---|---|
|
RTU500 series CMU Firmware version 13.5.1 – 13.5.4
Hitachi Energy / RTU500 series CMU Firmware
|
vers:RTU500_series_CMU_Firmware/>=13.5.1|<=13.5.4 |
Vendor Fix
Mitigation
|
|
|
RTU500 series CMU Firmware version 13.6.1 – 13.6.3
Hitachi Energy / RTU500 series CMU Firmware
|
vers:RTU500_series_CMU_Firmware/>=13.6.1|<=13.6.3 |
Vendor Fix
Mitigation
|
|
|
RTU500 series CMU Firmware version 13.7.1 – 13.7.8
Hitachi Energy / RTU500 series CMU Firmware
|
vers:RTU500_series_CMU_Firmware/>=13.7.1|<=13.7.8 |
Mitigation
Vendor Fix
|
|
|
RTU500 series CMU Firmware version 13.8.1 – 13.8.2
Hitachi Energy / RTU500 series CMU Firmware
|
vers:RTU500_series_CMU_Firmware/>=13.8.1|<=13.8.2 |
Mitigation
Vendor Fix
|
The XML-based services used in RTU500 has a vulnerability, where a use-after-free vulnerability in the xmlParseInternalSubset function of libxml2 may be triggered by processing specially crafted XML input. Improper handling of entity resolution can allow a remote attacker to cause a denial of service.
8.8 (High)
Affected products
Known affected
5 products, the same list as for
CVE-2026-17539
A vulnerability exists in the web-based management and services functions of RTU500 using libcurl library, when a custom `Host:` header is first set for an HTTP request and a second request is subsequently done using the same easy handle but without the custom `Host:` header set, the second request would use leaked stale information and pass on cookies meant for the first host in the second request.
7.5 (High)
Affected products
Known affected
4 products, the same list as for
CVE-2026-6732
A vulnerability exists in the web-based management and services functions of RTU500 using libcurl library. libcurl may fail to clear proxy authentication credentials when instructed to do so. As a result, stale credentials can be reused by subsequent transfers that should not access them, potentially exposing sensitive proxy authentication information.
5.3 (Medium)
Affected products
Known affected
4 products, the same list as for
CVE-2026-6732
A vulnerability exists in the web-based management and services functions of RTU500 using libcurl library. When the same libcurl handle is reused after a transfer to one HTTP origin using Digest authentication, libcurl may incorrectly send the Authorization header intended for the first origin to a second origin. This can disclose authentication information to an unintended host.
8.1 (High)
Affected products
Known affected
4 products, the same list as for
CVE-2026-6732
A vulnerability exists in the web-based management and services functions of RTU500 using libcurl library. When reusing a libcurl handle for sequential transfers with environment-variable proxy configuration, libcurl may fail to clear proxy authentication state between requests. This can leak the Proxy-Authorization header intended for one proxy to another proxy.
5.3 (Medium)
Affected products
Known affected
4 products, the same list as for
CVE-2026-6732
A vulnerability exists in the web-based management and services functions of RTU500 using libcurl library. libcurl may reuse an existing connection even after mTLS-related configuration options, especially client certificate or private key settings, have changed. This can bypass the intended authentication configuration and allow use of a connection that should no longer be reused.
7.5 (High)
Affected products
Known affected
4 products, the same list as for
CVE-2026-6732
References
41 references
{
"document": {
"acknowledgments": [
{
"organization": "Hitachi Energy Internal Team"
}
],
"aggregate_severity": {
"namespace": "https://www.first.org/cvss/specification-document",
"text": "HIGH"
},
"category": "csaf_security_advisory",
"csaf_version": "2.0",
"distribution": {
"text": "Disclosure is not limited",
"tlp": {
"label": "WHITE",
"url": "https://www.cisa.gov/news-events/news/traffic-light-protocol-tlp-definitions-and-usage"
}
},
"lang": "en-US",
"notes": [
{
"category": "summary",
"text": "Hitachi Energy is aware of vulnerabilities that affect RTU500 product versions listed in this document. These vulnerabilities if exploited can have impact on confidentiality, integrity and availability of the product. Please refer to the Recommended Immediate Actions for information about the mitigation/remediation.",
"title": "Summary"
},
{
"category": "legal_disclaimer",
"text": "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.",
"title": "Notice"
},
{
"category": "general",
"text": "For additional information and support please contact your product provider or Hitachi Energy service organization. For contact information, see https://www.hitachienergy.com/contact-us/ for Hitachi Energy contact-centers.",
"title": "Support"
},
{
"category": "general",
"text": "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.\nAdditional information on Industrial Control Systems Cybersecurity Best Practices can be found in the Hitachi Energy \u201cIndustrial Control Systems Cybersecurity Best Practices\u201d Cybersecurity Notification. [1]",
"title": "General Mitigation Factors"
},
{
"category": "other",
"text": "Energy",
"title": "Critical infrastructure sectors"
},
{
"category": "other",
"text": "Worldwide",
"title": "Countries/areas deployed"
},
{
"category": "other",
"text": "Switzerland",
"title": "Company headquarters location"
},
{
"category": "details",
"text": "SSVCv2/E:N/A:N/2026-09-28T14:29:30Z/",
"title": "SSVC"
},
{
"category": "legal_disclaimer",
"text": "This product is provided subject to this Notification (https://www.cisa.gov/notification) and this Privacy \u0026 Use policy (https://www.cisa.gov/privacy-policy).",
"title": "Legal Notice and Terms of Use"
},
{
"category": "other",
"text": "This ICSA is a verbatim republication of Hitachi Energy PSIRT 8DBD000259 from a direct conversion of the vendor\u0027s Common Security Advisory Framework (CSAF) advisory. This is republished to CISA\u0027s 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.",
"title": "Advisory Conversion Disclaimer"
},
{
"category": "general",
"text": "CISA recommends users take defensive measures to minimize the exploitation risk of this vulnerability.",
"title": "Recommended Practices"
},
{
"category": "general",
"text": "Minimize network exposure for all control system devices and/or systems, and ensure they are not accessible from the internet.",
"title": "Recommended Practices"
},
{
"category": "general",
"text": "Locate control system networks and remote devices behind firewalls and isolate them from business networks.",
"title": "Recommended Practices"
},
{
"category": "general",
"text": "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.",
"title": "Recommended Practices"
},
{
"category": "general",
"text": "CISA reminds organizations to perform proper impact analysis and risk assessment prior to deploying defensive measures.",
"title": "Recommended Practices"
},
{
"category": "general",
"text": "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.",
"title": "Recommended Practices"
},
{
"category": "general",
"text": "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.",
"title": "Recommended Practices"
},
{
"category": "general",
"text": "Organizations observing suspected malicious activity should follow established internal procedures and report findings to CISA for tracking and correlation against other incidents.",
"title": "Recommended Practices"
}
],
"publisher": {
"category": "other",
"contact_details": "central@cisa.dhs.gov",
"name": "CISA",
"namespace": "https://www.cisa.gov/"
},
"references": [
{
"category": "self",
"summary": "ICS Advisory ICSA-26-293-05 JSON",
"url": "https://raw.githubusercontent.com/cisagov/CSAF/develop/csaf_files/OT/white/2026/icsa-26-293-05.json"
},
{
"category": "self",
"summary": "[1] Hitachi Energy Notification for Industrial Control Systems Cybersecurity Best Practices",
"url": "https://publisher.hitachienergy.com/preview?DocumentID=8DBD000235\u0026LanguageCode=en\u0026DocumentPartId=\u0026Action=Launch"
},
{
"category": "self",
"summary": "Multiple Vulnerabilities in Hitachi Energy RTU500 Product",
"url": "https://publisher.hitachienergy.com/preview?DocumentID=8DBD000259\u0026LanguageCode=en\u0026DocumentPartId=\u0026Action=launch"
},
{
"category": "self",
"summary": "ICS Advisory ICSA-26-293-05 - Web Version",
"url": "https://www.cisa.gov/news-events/ics-advisories/icsa-26-293-05"
},
{
"category": "external",
"summary": "Recommended Practices",
"url": "https://www.cisa.gov/news-events/ics-alerts/ics-alert-10-301-01"
},
{
"category": "external",
"summary": "Recommended Practices",
"url": "https://www.cisa.gov/resources-tools/resources/ics-recommended-practices"
},
{
"category": "external",
"summary": "Recommended Practices",
"url": "https://www.cisa.gov/topics/industrial-control-systems"
},
{
"category": "external",
"summary": "Recommended Practices",
"url": "https://www.cisa.gov/sites/default/files/recommended_practices/NCCIC_ICS-CERT_Defense_in_Depth_2016_S508C.pdf"
},
{
"category": "external",
"summary": "Recommended Practices",
"url": "https://www.cisa.gov/sites/default/files/publications/Cybersecurity_Best_Practices_for_Industrial_Control_Systems.pdf"
},
{
"category": "external",
"summary": "Recommended Practices",
"url": "https://www.cisa.gov/news-events/news/targeted-cyber-intrusion-detection-and-mitigation-strategies-update-b"
}
],
"title": "Hitachi Energy RTU500 Product",
"tracking": {
"current_release_date": "2026-10-20T06:00:00.000000Z",
"generator": {
"date": "2026-10-14T20:33:28.992573Z",
"engine": {
"name": "CISA CSAF Generator",
"version": "1.5.0"
}
},
"id": "ICSA-26-293-05",
"initial_release_date": "2026-09-01T00:00:00.000000Z",
"revision_history": [
{
"date": "2026-09-01T00:00:00.000000Z",
"legacy_version": "Initial",
"number": "1",
"summary": "Initial public release"
},
{
"date": "2026-09-29T00:00:00.000000Z",
"legacy_version": "Additional Release 1",
"number": "2",
"summary": "Updated fixed version 12.7.8"
},
{
"date": "2026-10-20T06:00:00.000000Z",
"legacy_version": "CISA Republication",
"number": "3",
"summary": "Initial CISA Republication of Hitachi Energy PSIRT 8DBD000259 advisory"
}
],
"status": "final",
"version": "3"
}
},
"product_tree": {
"branches": [
{
"branches": [
{
"branches": [
{
"category": "product_version_range",
"name": "vers:RTU500_series_CMU_Firmware/\u003e=13.5.1|\u003c=13.5.4",
"product": {
"name": "RTU500 series CMU Firmware version 13.5.1 \u2013 13.5.4",
"product_id": "CSAFPID-0001"
}
},
{
"category": "product_version_range",
"name": "vers:RTU500_series_CMU_Firmware/\u003e=13.6.1|\u003c=13.6.3",
"product": {
"name": "RTU500 series CMU Firmware version 13.6.1 \u2013 13.6.3",
"product_id": "CSAFPID-0002"
}
},
{
"category": "product_version_range",
"name": "vers:RTU500_series_CMU_Firmware/\u003e=13.7.1|\u003c=13.7.8",
"product": {
"name": "RTU500 series CMU Firmware version 13.7.1 \u2013 13.7.8",
"product_id": "CSAFPID-0003"
}
},
{
"category": "product_version_range",
"name": "vers:RTU500_series_CMU_Firmware/\u003e=13.8.1|\u003c=13.8.2",
"product": {
"name": "RTU500 series CMU Firmware version 13.8.1 \u2013 13.8.2",
"product_id": "CSAFPID-0004"
}
},
{
"category": "product_version_range",
"name": "vers:RTU500_series_CMU_Firmware/\u003e=12.7.1|\u003c=12.7.7",
"product": {
"name": "RTU500 series CMU Firmware version 12.7.1 \u2013 12.7.7",
"product_id": "CSAFPID-0005"
}
}
],
"category": "product_name",
"name": "RTU500 series CMU Firmware"
}
],
"category": "vendor",
"name": "Hitachi Energy"
}
]
},
"vulnerabilities": [
{
"cve": "CVE-2026-17539",
"cwe": {
"id": "CWE-476",
"name": "NULL Pointer Dereference"
},
"notes": [
{
"category": "description",
"text": "RTU500 has a vulnerability, where high-load scenarios, such as sending GI requests at short intervals, may cause a NULL pointer dereference in the last entry of the enhanced message queue. This can cause a BCI_IEC104 fatal write error, resulting in connection interruption and restart, and ultimately a denial of service for bidirectional IEC 60870-5-104 communication."
}
],
"product_status": {
"known_affected": [
"CSAFPID-0001",
"CSAFPID-0002",
"CSAFPID-0003",
"CSAFPID-0004",
"CSAFPID-0005"
]
},
"references": [
{
"category": "external",
"summary": "NVD - CVE-2026-17539",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-17539"
},
{
"category": "external",
"summary": "www.cve.org",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-17539"
},
{
"category": "external",
"summary": "cwe.mitre.org",
"url": "https://cwe.mitre.org/data/definitions/476.html"
},
{
"category": "external",
"summary": "www.first.org",
"url": "https://www.first.org/cvss/calculator/3.1#CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H"
}
],
"remediations": [
{
"category": "vendor_fix",
"details": "Update to CMU Firmware version 13.9.1",
"product_ids": [
"CSAFPID-0001",
"CSAFPID-0002"
]
},
{
"category": "mitigation",
"details": "Follow general mitigation factors/workarounds",
"product_ids": [
"CSAFPID-0005",
"CSAFPID-0001",
"CSAFPID-0002",
"CSAFPID-0003",
"CSAFPID-0004"
]
},
{
"category": "vendor_fix",
"details": "Update to CMU Firmware version 13.9.1 or 13.7.9 (when available)",
"product_ids": [
"CSAFPID-0003"
]
},
{
"category": "vendor_fix",
"details": "Update to CMU Firmware version 13.9.1 or 13.8.3*",
"product_ids": [
"CSAFPID-0004"
]
},
{
"category": "vendor_fix",
"details": "Update to CMU Firmware version 12.7.8 OR",
"product_ids": [
"CSAFPID-0005"
]
},
{
"category": "vendor_fix",
"details": "Upgrade to CMU Firmware version 13.9.1",
"product_ids": [
"CSAFPID-0005"
]
}
],
"scores": [
{
"cvss_v3": {
"attackComplexity": "HIGH",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 5.9,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H",
"version": "3.1"
},
"products": [
"CSAFPID-0001",
"CSAFPID-0002",
"CSAFPID-0003",
"CSAFPID-0004",
"CSAFPID-0005"
]
}
],
"title": "CVE-2026-17539"
},
{
"cve": "CVE-2026-28388",
"cwe": {
"id": "CWE-476",
"name": "NULL Pointer Dereference"
},
"notes": [
{
"category": "description",
"text": "A vulnerability exists in OpenSSL library component of RTU500 that is used for secure HTTPS access, authenticating and establishing encrypted communications with other devices. When processing a malformed delta CRL with a Delta CRL Indicator but no required CRL Number extension, OpenSSL may dereference a NULL pointer, causing a Denial of Service during X.509 certificate verification. Exploitation requires delta CRL processing to be enabled, a relevant freshest CRL condition to be present, and an attacker-supplied malformed CRL. The issue is limited to Denial of Service and cannot lead to code execution or memory disclosure."
}
],
"product_status": {
"known_affected": [
"CSAFPID-0001",
"CSAFPID-0002",
"CSAFPID-0003",
"CSAFPID-0004",
"CSAFPID-0005"
]
},
"references": [
{
"category": "external",
"summary": "NVD - CVE-2026-28388",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-28388"
},
{
"category": "external",
"summary": "www.cve.org",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-28388"
},
{
"category": "external",
"summary": "cwe.mitre.org",
"url": "https://cwe.mitre.org/data/definitions/476.html"
},
{
"category": "external",
"summary": "www.first.org",
"url": "https://www.first.org/cvss/calculator/3.1#CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
}
],
"remediations": [
{
"category": "vendor_fix",
"details": "Update to CMU Firmware version 13.9.1",
"product_ids": [
"CSAFPID-0001",
"CSAFPID-0002"
]
},
{
"category": "mitigation",
"details": "Follow general mitigation factors/workarounds",
"product_ids": [
"CSAFPID-0005",
"CSAFPID-0001",
"CSAFPID-0002",
"CSAFPID-0003",
"CSAFPID-0004"
]
},
{
"category": "vendor_fix",
"details": "Update to CMU Firmware version 13.9.1 or 13.7.9 (when available)",
"product_ids": [
"CSAFPID-0003"
]
},
{
"category": "vendor_fix",
"details": "Update to CMU Firmware version 13.9.1 or 13.8.3*",
"product_ids": [
"CSAFPID-0004"
]
},
{
"category": "vendor_fix",
"details": "Update to CMU Firmware version 12.7.8 OR",
"product_ids": [
"CSAFPID-0005"
]
},
{
"category": "vendor_fix",
"details": "Upgrade to CMU Firmware version 13.9.1",
"product_ids": [
"CSAFPID-0005"
]
}
],
"scores": [
{
"cvss_v3": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 7.5,
"baseSeverity": "HIGH",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"version": "3.1"
},
"products": [
"CSAFPID-0001",
"CSAFPID-0002",
"CSAFPID-0003",
"CSAFPID-0004",
"CSAFPID-0005"
]
}
],
"title": "CVE-2026-28388"
},
{
"cve": "CVE-2026-6732",
"cwe": {
"id": "CWE-843",
"name": "Access of Resource Using Incompatible Type (\u0027Type Confusion\u0027)"
},
"notes": [
{
"category": "description",
"text": "The XML-based services used in RTU500 has a vulnerability while processing a specially crafted XSD-validated XML document may trigger a type confusion error in libxml2. An attacker could exploit this condition to cause a denial of service."
}
],
"product_status": {
"known_affected": [
"CSAFPID-0001",
"CSAFPID-0002",
"CSAFPID-0003",
"CSAFPID-0004"
]
},
"references": [
{
"category": "external",
"summary": "NVD - CVE-2026-6732",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-6732"
},
{
"category": "external",
"summary": "www.cve.org",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-6732"
},
{
"category": "external",
"summary": "cwe.mitre.org",
"url": "https://cwe.mitre.org/data/definitions/843.html"
},
{
"category": "external",
"summary": "www.first.org",
"url": "https://www.first.org/cvss/calculator/3.1#CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
}
],
"remediations": [
{
"category": "vendor_fix",
"details": "Update to CMU Firmware version 13.9.1",
"product_ids": [
"CSAFPID-0001",
"CSAFPID-0002"
]
},
{
"category": "mitigation",
"details": "Follow general mitigation factors/workarounds",
"product_ids": [
"CSAFPID-0001",
"CSAFPID-0002",
"CSAFPID-0003",
"CSAFPID-0004"
]
},
{
"category": "vendor_fix",
"details": "Update to CMU Firmware version 13.9.1 or 13.7.9 (when available)",
"product_ids": [
"CSAFPID-0003"
]
},
{
"category": "vendor_fix",
"details": "Update to CMU Firmware version 13.9.1 or 13.8.3*",
"product_ids": [
"CSAFPID-0004"
]
}
],
"scores": [
{
"cvss_v3": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 7.5,
"baseSeverity": "HIGH",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"version": "3.1"
},
"products": [
"CSAFPID-0001",
"CSAFPID-0002",
"CSAFPID-0003",
"CSAFPID-0004"
]
}
],
"title": "CVE-2026-6732"
},
{
"cve": "CVE-2026-6653",
"cwe": {
"id": "CWE-416",
"name": "Use After Free"
},
"notes": [
{
"category": "description",
"text": "The XML-based services used in RTU500 has a vulnerability, where a use-after-free vulnerability in the xmlParseInternalSubset function of libxml2 may be triggered by processing specially crafted XML input. Improper handling of entity resolution can allow a remote attacker to cause a denial of service."
}
],
"product_status": {
"known_affected": [
"CSAFPID-0001",
"CSAFPID-0002",
"CSAFPID-0003",
"CSAFPID-0004",
"CSAFPID-0005"
]
},
"references": [
{
"category": "external",
"summary": "NVD - CVE-2026-6653",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-6653"
},
{
"category": "external",
"summary": "www.cve.org",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-6653"
},
{
"category": "external",
"summary": "cwe.mitre.org",
"url": "https://cwe.mitre.org/data/definitions/416.html"
},
{
"category": "external",
"summary": "www.first.org",
"url": "https://www.first.org/cvss/calculator/3.1#CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"
}
],
"remediations": [
{
"category": "vendor_fix",
"details": "Update to CMU Firmware version 13.9.1",
"product_ids": [
"CSAFPID-0001",
"CSAFPID-0002"
]
},
{
"category": "mitigation",
"details": "Follow general mitigation factors/workarounds",
"product_ids": [
"CSAFPID-0005",
"CSAFPID-0001",
"CSAFPID-0002",
"CSAFPID-0003",
"CSAFPID-0004"
]
},
{
"category": "vendor_fix",
"details": "Update to CMU Firmware version 13.9.1 or 13.7.9 (when available)",
"product_ids": [
"CSAFPID-0003"
]
},
{
"category": "vendor_fix",
"details": "Update to CMU Firmware version 13.9.1 or 13.8.3*",
"product_ids": [
"CSAFPID-0004"
]
},
{
"category": "vendor_fix",
"details": "Update to CMU Firmware version 12.7.8 OR",
"product_ids": [
"CSAFPID-0005"
]
},
{
"category": "vendor_fix",
"details": "Upgrade to CMU Firmware version 13.9.1",
"product_ids": [
"CSAFPID-0005"
]
}
],
"scores": [
{
"cvss_v3": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 8.8,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
},
"products": [
"CSAFPID-0001",
"CSAFPID-0002",
"CSAFPID-0003",
"CSAFPID-0004",
"CSAFPID-0005"
]
}
],
"title": "CVE-2026-6653"
},
{
"cve": "CVE-2026-6276",
"cwe": {
"id": "CWE-319",
"name": "Cleartext Transmission of Sensitive Information"
},
"notes": [
{
"category": "description",
"text": "A vulnerability exists in the web-based management and services functions of RTU500 using libcurl library, when a custom `Host:` header is first set for an HTTP request and a second request is subsequently done using the same easy handle but without the custom `Host:` header set, the second request would use leaked stale information and pass on cookies meant for the first host in the second request."
}
],
"product_status": {
"known_affected": [
"CSAFPID-0001",
"CSAFPID-0002",
"CSAFPID-0003",
"CSAFPID-0004"
]
},
"references": [
{
"category": "external",
"summary": "NVD - CVE-2026-6276",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-6276"
},
{
"category": "external",
"summary": "www.cve.org",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-6276"
},
{
"category": "external",
"summary": "cwe.mitre.org",
"url": "https://cwe.mitre.org/data/definitions/319.html"
},
{
"category": "external",
"summary": "www.first.org",
"url": "https://www.first.org/cvss/calculator/3.1#CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
}
],
"remediations": [
{
"category": "vendor_fix",
"details": "Update to CMU Firmware version 13.9.1",
"product_ids": [
"CSAFPID-0001",
"CSAFPID-0002"
]
},
{
"category": "mitigation",
"details": "Follow general mitigation factors/workarounds",
"product_ids": [
"CSAFPID-0001",
"CSAFPID-0002",
"CSAFPID-0003",
"CSAFPID-0004"
]
},
{
"category": "vendor_fix",
"details": "Update to CMU Firmware version 13.9.1 or 13.7.9 (when available)",
"product_ids": [
"CSAFPID-0003"
]
},
{
"category": "vendor_fix",
"details": "Update to CMU Firmware version 13.9.1 or 13.8.3*",
"product_ids": [
"CSAFPID-0004"
]
}
],
"scores": [
{
"cvss_v3": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 7.5,
"baseSeverity": "HIGH",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"version": "3.1"
},
"products": [
"CSAFPID-0001",
"CSAFPID-0002",
"CSAFPID-0003",
"CSAFPID-0004"
]
}
],
"title": "CVE-2026-6276"
},
{
"cve": "CVE-2026-9079",
"cwe": {
"id": "CWE-522",
"name": "Insufficiently Protected Credentials"
},
"notes": [
{
"category": "description",
"text": "A vulnerability exists in the web-based management and services functions of RTU500 using libcurl library. libcurl may fail to clear proxy authentication credentials when instructed to do so. As a result, stale credentials can be reused by subsequent transfers that should not access them, potentially exposing sensitive proxy authentication information."
}
],
"product_status": {
"known_affected": [
"CSAFPID-0001",
"CSAFPID-0002",
"CSAFPID-0003",
"CSAFPID-0004"
]
},
"references": [
{
"category": "external",
"summary": "NVD - CVE-2026-9079",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-9079"
},
{
"category": "external",
"summary": "www.cve.org",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-9079"
},
{
"category": "external",
"summary": "cwe.mitre.org",
"url": "https://cwe.mitre.org/data/definitions/522.html"
},
{
"category": "external",
"summary": "www.first.org",
"url": "https://www.first.org/cvss/calculator/3.1#CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N"
}
],
"remediations": [
{
"category": "vendor_fix",
"details": "Update to CMU Firmware version 13.9.1",
"product_ids": [
"CSAFPID-0001",
"CSAFPID-0002"
]
},
{
"category": "mitigation",
"details": "Follow general mitigation factors/workarounds",
"product_ids": [
"CSAFPID-0001",
"CSAFPID-0002",
"CSAFPID-0003",
"CSAFPID-0004"
]
},
{
"category": "vendor_fix",
"details": "Update to CMU Firmware version 13.9.1 or 13.7.9 (when available)",
"product_ids": [
"CSAFPID-0003"
]
},
{
"category": "vendor_fix",
"details": "Update to CMU Firmware version 13.9.1 or 13.8.3*",
"product_ids": [
"CSAFPID-0004"
]
}
],
"scores": [
{
"cvss_v3": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 5.3,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "LOW",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N",
"version": "3.1"
},
"products": [
"CSAFPID-0001",
"CSAFPID-0002",
"CSAFPID-0003",
"CSAFPID-0004"
]
}
],
"title": "CVE-2026-9079"
},
{
"cve": "CVE-2026-11856",
"cwe": {
"id": "CWE-294",
"name": "Authentication Bypass by Capture-replay"
},
"notes": [
{
"category": "description",
"text": "A vulnerability exists in the web-based management and services functions of RTU500 using libcurl library. When the same libcurl handle is reused after a transfer to one HTTP origin using Digest authentication, libcurl may incorrectly send the Authorization header intended for the first origin to a second origin. This can disclose authentication information to an unintended host."
}
],
"product_status": {
"known_affected": [
"CSAFPID-0001",
"CSAFPID-0002",
"CSAFPID-0003",
"CSAFPID-0004"
]
},
"references": [
{
"category": "external",
"summary": "NVD - CVE-2026-11856",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-11856"
},
{
"category": "external",
"summary": "www.cve.org",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-11856"
},
{
"category": "external",
"summary": "cwe.mitre.org",
"url": "https://cwe.mitre.org/data/definitions/294.html"
},
{
"category": "external",
"summary": "www.first.org",
"url": "https://www.first.org/cvss/calculator/3.1#CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H"
}
],
"remediations": [
{
"category": "vendor_fix",
"details": "Update to CMU Firmware version 13.9.1",
"product_ids": [
"CSAFPID-0001",
"CSAFPID-0002"
]
},
{
"category": "mitigation",
"details": "Follow general mitigation factors/workarounds",
"product_ids": [
"CSAFPID-0001",
"CSAFPID-0002",
"CSAFPID-0003",
"CSAFPID-0004"
]
},
{
"category": "vendor_fix",
"details": "Update to CMU Firmware version 13.9.1 or 13.7.9 (when available)",
"product_ids": [
"CSAFPID-0003"
]
},
{
"category": "vendor_fix",
"details": "Update to CMU Firmware version 13.9.1 or 13.8.3*",
"product_ids": [
"CSAFPID-0004"
]
}
],
"scores": [
{
"cvss_v3": {
"attackComplexity": "HIGH",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 8.1,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
},
"products": [
"CSAFPID-0001",
"CSAFPID-0002",
"CSAFPID-0003",
"CSAFPID-0004"
]
}
],
"title": "CVE-2026-11856"
},
{
"cve": "CVE-2026-8927",
"cwe": {
"id": "CWE-294",
"name": "Authentication Bypass by Capture-replay"
},
"notes": [
{
"category": "description",
"text": "A vulnerability exists in the web-based management and services functions of RTU500 using libcurl library. When reusing a libcurl handle for sequential transfers with environment-variable proxy configuration, libcurl may fail to clear proxy authentication state between requests. This can leak the Proxy-Authorization header intended for one proxy to another proxy."
}
],
"product_status": {
"known_affected": [
"CSAFPID-0001",
"CSAFPID-0002",
"CSAFPID-0003",
"CSAFPID-0004"
]
},
"references": [
{
"category": "external",
"summary": "NVD - CVE-2026-8927",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-8927"
},
{
"category": "external",
"summary": "www.cve.org",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-8927"
},
{
"category": "external",
"summary": "cwe.mitre.org",
"url": "https://cwe.mitre.org/data/definitions/294.html"
},
{
"category": "external",
"summary": "www.first.org",
"url": "https://www.first.org/cvss/calculator/3.1#CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N"
}
],
"remediations": [
{
"category": "vendor_fix",
"details": "Update to CMU Firmware version 13.9.1",
"product_ids": [
"CSAFPID-0001",
"CSAFPID-0002"
]
},
{
"category": "mitigation",
"details": "Follow general mitigation factors/workarounds",
"product_ids": [
"CSAFPID-0001",
"CSAFPID-0002",
"CSAFPID-0003",
"CSAFPID-0004"
]
},
{
"category": "vendor_fix",
"details": "Update to CMU Firmware version 13.9.1 or 13.7.9 (when available)",
"product_ids": [
"CSAFPID-0003"
]
},
{
"category": "vendor_fix",
"details": "Update to CMU Firmware version 13.9.1 or 13.8.3*",
"product_ids": [
"CSAFPID-0004"
]
}
],
"scores": [
{
"cvss_v3": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 5.3,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "LOW",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N",
"version": "3.1"
},
"products": [
"CSAFPID-0001",
"CSAFPID-0002",
"CSAFPID-0003",
"CSAFPID-0004"
]
}
],
"title": "CVE-2026-8927"
},
{
"cve": "CVE-2026-8932",
"cwe": {
"id": "CWE-305",
"name": "Authentication Bypass by Primary Weakness"
},
"notes": [
{
"category": "description",
"text": "A vulnerability exists in the web-based management and services functions of RTU500 using libcurl library. libcurl may reuse an existing connection even after mTLS-related configuration options, especially client certificate or private key settings, have changed. This can bypass the intended authentication configuration and allow use of a connection that should no longer be reused."
}
],
"product_status": {
"known_affected": [
"CSAFPID-0001",
"CSAFPID-0002",
"CSAFPID-0003",
"CSAFPID-0004"
]
},
"references": [
{
"category": "external",
"summary": "NVD - CVE-2026-8932",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-8932"
},
{
"category": "external",
"summary": "www.cve.org",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-8932"
},
{
"category": "external",
"summary": "cwe.mitre.org",
"url": "https://cwe.mitre.org/data/definitions/305.html"
},
{
"category": "external",
"summary": "www.first.org",
"url": "https://www.first.org/cvss/calculator/3.1#CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N"
}
],
"remediations": [
{
"category": "vendor_fix",
"details": "Update to CMU Firmware version 13.9.1",
"product_ids": [
"CSAFPID-0001",
"CSAFPID-0002"
]
},
{
"category": "mitigation",
"details": "Follow general mitigation factors/workarounds",
"product_ids": [
"CSAFPID-0001",
"CSAFPID-0002",
"CSAFPID-0003",
"CSAFPID-0004"
]
},
{
"category": "vendor_fix",
"details": "Update to CMU Firmware version 13.9.1 or 13.7.9 (when available)",
"product_ids": [
"CSAFPID-0003"
]
},
{
"category": "vendor_fix",
"details": "Update to CMU Firmware version 13.9.1 or 13.8.3*",
"product_ids": [
"CSAFPID-0004"
]
}
],
"scores": [
{
"cvss_v3": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 7.5,
"baseSeverity": "HIGH",
"confidentialityImpact": "NONE",
"integrityImpact": "HIGH",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N",
"version": "3.1"
},
"products": [
"CSAFPID-0001",
"CSAFPID-0002",
"CSAFPID-0003",
"CSAFPID-0004"
]
}
],
"title": "CVE-2026-8932"
}
]
}
Loading…
Loading…
Drag nodes to arrange them. Double-click a related vulnerability to open it, or a source to visit its link. The Physics button on the left tunes the layout and the simulation; the legend at the bottom left hides or shows nodes by kind and by sighting type.
Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
Vulnerability timeline
Sightings and recorded dates, grouped by day · UTC
Loading timeline…
Loading…
Loading…
The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
Loading…
Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.