Schneider Electric Modicon M340 Controller and Communication Modules

CCISA Advisories · 7 hours ago

View CSAF Summary Schneider Electric is aware of a vulnerability in its Modicon M340 https://www.se.com/ww/en/product-range/1468-modicon-m340-pac/, BMXNOR0200H https://www.se.com/us/en/product/BMXNOR0200H/communication-module-modicon-m340-iec-608705101-104-dnp3-for-severe-environments/: Modicon M340 X80 Ethernet Communication Modules, BMXNGD0100 https://www.se.com/us/en/product/BMXNGD0100/communication-module-modicon-m580-global-data-service/: M580 Global Data module, BMXNOC0401 https://www.se.com/us/en/product/BMXNOC0401/network-module-modicon-m340-ethernet-ip-and-modbus-tcp-4-x-rj45/?pageType=product&sourceId=BMXNOC0401: Modicon M340 X80 Ethernet Communication modules, BMXNOE0100 https://www.se.com/ww/en/product/BMXNOE0100/network-module-modicon-m340-modbus-tcp-1-x-rj45-flash-memory-card/?pageType=product&sourceId=BMXNOE0100: Modbus/TCP Ethernet Modicon M340 module, BMXNOE0110 https://www.se.com/ww/en/product/BMXNOE0110/ethernet-tcp-ip-network-module-modicon-m340-automation-platform-flash-memory-card-internal-ram-16-mb-1-x-rj45-10-100/: Modbus/TCP Ethernet Modicon M340 FactoryCast module product(s). Failure to apply the fix provided below may risk Denial Of Service attack, which could result in the unavailability of the devices. The following versions of Schneider Electric Modicon M340 Controller and Communication Modules are affected: Schneider Electric Ethernet/Serial RTU Module: vers:generic/<SV1.7_IR27 Schneider Electric M580 Global Data module: vers:all/* Schneider Electric Ethernet / Serial RTU Module: vers:all/* Schneider Electric Modbus/TCP Ethernet Modicon M340 module: vers:intdot/<3.60 Schneider Electric Modbus/TCP Ethernet Modicon M340 FactoryCast module: vers:intdot/<6.80 Schneider Electric Modicon M340 Firmware Versions prior to SV3.70 installed on Modicon M340 Controller: All versions CVSS Vendor Equipment Vulnerabilities v3 7.5 Schneider Electric Schneider Electric Modicon M340 Controller and Communication Modules Improper Input Validation Background Critical Infrastructure Sectors: Chemical, Commercial Facilities, Critical Manufacturing, Energy, Water and Wastewater Countries/Areas Deployed: Worldwide Company Headquarters Location: France Vulnerabilities Expand All + CVE-2025-6625 CWE-20: Improper Input Validation vulnerability exists that could cause a Denial Of Service when specific crafted FTP command is sent to the device. View CVE Details Affected Products Schneider Electric Modicon M340 Controller and Communication Modules Vendor:Schneider Electric Product Version:Ethernet / Serial RTU Module All versions, M580 Global Data module All versions, Modicon M340 X80 Ethernet Communication modules All versions, Modbus/TCP Ethernet Modicon M340 module Versions prior to 3.60, Modbus/TCP Ethernet Modicon M340 FactoryCast module Versions prior to 6.80 Product Status:fixed, known_affected Remediations Vendor fixVersion 3.60 of BMXNOE0100 includes a fix for this vulnerability and is available for download here: https://www.se.com/ww/en/product/BMXNOE0100/network-module-modicon-m340-modbus-tcp-1-x-rj45-flash-memory-card/  Reboot is needed to complete the firmware upgrade  Vendor fixVersion 6.80 of BMXNOE0110 includes a fix for this vulnerability and is available for download here: https://www.se.com/ww/en/product/BMXNOE0110/ethernet-tcp-ip-network-module-modicon-m340-automation-platform-flash-memory-card-internal-ram-16-mb-1-x-rj45-10-100/  Reboot is needed to complete the firmware upgrade  Vendor fixVersion SV3.70 of Modicon M340 includes a fix for this vulnerability and is available for download here: https://www.se.com/ww/en/product-range/1468-modicon-m340/#software-and-firmware Vendor fixVersion SV1.7 IR27 of BMXNOR0200H includes a fix for this vulnerability and is available for download here: https://www.se.com/ww/en/product/BMXNOR0200H/ethernet-serial-rtu-module-2-x-rj45/ MitigationIf customers choose not to apply the remediation provided above, they should immediately apply the following mitigations to reduce the risk of exploit:  FTP service is disabled by default. Ensure to disable FTP service when not in use. Setup network segmentation and implement a firewall to block all unauthorized access to ports 21/FTP. Use VPN (Virtual Private Networks) tunnels if remote access is required. MitigationSchneider Electric is establishing a remediation plan for all future versions of: Modicon M340 BMXNOR0200H BMXNGD0100 BMXNOC401  Schneider Electric will update this document when the remediation is available. Until then, customers should immediately apply the following mitigations to reduce the risk of exploit:  FTP service is disabled by default. Ensure to disable FTP service when not in use. Setup network segmentation and implement a firewall to block all unauthorized access to ports 21/FTP. Use VPN (Virtual Private Networks) tunnels if remote access is required. Mitigation For more information see the associated Schneider Electric security advisory Modicon M340 Controller and Communication Modules - SEVD-2025-224-05 CSAF Version, Modicon M340 Controller and Communication Modules - SEVD-2025-224-05 PDF Version. Relevant CWE: CWE-20 Improper Input Validation Metrics CVSS Version Base Score Base Severity Vector String 3.1 7.5 HIGH CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Acknowledgments Schneider Electric CPCERT reported this vulnerability to CISA. General Security Recommendations We strongly recommend the following industry cybersecurity best practices.  Locate control and safety system networks and remote devices behind firewalls and isolate them from the business network.  Install physical controls so no unauthorized personnel can access your industrial control and safety systems, components, peripheral equipment, and networks.  Place all controllers in locked cabinets and never leave them in the “Program” mode.  Never connect programming software to any network other than the network intended for that device.  Scan all methods of mobile data exchange with the isolated network such as CDs, USB drives, etc. before use in the terminals or any node connected to these networks.  Never allow mobile devices that have connected to any other network besides the intended network to connect to the safety or control networks without proper sanitation.  Minimize network exposure for all control system devices and systems and ensure that they are not accessible from the Internet.  When remote access is required, use secure methods, such as Virtual Private Networks (VPNs).  Recognize that VPNs may have vulnerabilities and should be updated to the most current version available. Also, understand that VPNs are only as secure as the connected devices.  For more information refer to the Schneider Electric Recommended Cybersecurity Best Practices document. For More Information This document provides an overview of the identified vulnerability or vulnerabilities and actions required to mitigate. For more details and assistance on how to protect your installation, contact your local Schneider Electric representative or Schneider Electric Industrial Cybersecurity Services: https://www.se.com/ww/en/work/solutions/cybersecurity/. These organizations will be fully aware of this situation and can support you through the process. For further information related to cybersecurity in Schneider Electric's products, visit the company's cybersecurity support portal page: https://www.se.com/ww/en/work/support/cybersecurity/overview.jsp LEGAL DISCLAIMER THIS NOTIFICATION DOCUMENT, THE INFORMATION CONTAINED HEREIN, AND ANY MATERIALS LINKED FROM IT (COLLECTIVELY, THIS “NOTIFICATION”) ARE INTENDED TO HELP PROVIDE AN OVERVIEW OF THE IDENTIFIED SITUATION AND SUGGESTED MITIGATION ACTIONS, REMEDIATION, FIX, AND/OR GENERAL SECURITY RECOMMENDATIONS AND IS PROVIDED ON AN “AS-IS” BASIS WITHOUT WARRANTY OR GUARANTEE OF ANY KIND. SCHNEIDER ELECTRIC DISCLAIMS ALL WARRANTIES RELATING TO THIS NOTIFICATION, EITHER EXPRESS OR IMPLIED, INCLUDING WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. SCHNEIDER ELECTRIC MAKES NO WARRANTY THAT THE NOTIFICATION WILL RESOLVE THE IDENTIFIED SITUATION. IN NO EVENT SHALL SCHNEIDER ELECTRIC BE LIABLE FOR ANY DAMAGES OR LOSSES WHATSOEVER IN CONNECTION WITH THIS NOTIFICATION, INCLUDING DIRECT, INDIRECT, INCIDENTAL, CONSEQUENTIAL, LOSS OF BUSINESS PROFITS OR SPECIAL DAMAGES, EVEN IF SCHNEIDER ELECTRIC HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. YOUR USE OF THIS NOTIFICATION IS AT YOUR OWN RISK, AND YOU ARE SOLELY LIABLE FOR ANY DAMAGES TO YOUR SYSTEMS OR ASSETS OR OTHER LOSSES THAT MAY RESULT FROM YOUR USE OF THIS NOTIFICATION. SCHNEIDER ELECTRIC RESERVES THE RIGHT TO UPDATE OR CHANGE THIS NOTIFICATION AT ANY TIME AND IN ITS SOLE DISCRETION About Schneider Electric Schneider's purpose is to create Impact by empowering all to make the most of our energy and resources, bridging progress and sustainability for all. We call this Life Is On. Our mission is to be the trusted partner in Sustainability and Efficiency. We are a global industrial technology leader bringing world-leading expertise in electrification, automation and digitization to smart industries, resilient infrastructure, future-proof data centers, intelligent buildings, and intuitive homes. Anchored by our deep domain expertise, we provide integrated end-to-end lifecycle AI enabled Industrial IoT solutions with connected products, automation, software and services, delivering digital twins to enable profitable growth for our customers. We are a people company with an ecosystem of 150,000 colleagues and more than a million partners operating in over 100 countries to ensure proximity to our customers and stakeholders. We embrace diversity and inclusion in everything we do, guided by our meaningful purpose of a sustainable future for all. www.se.com 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). Recommended Practices CISA recommends users take defensive measures to minimize the exploitation risk of these vulnerabilities. Minimize network exposure for all control system devices and/or 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 Schneider Electric CPCERT SEVD-2025-224-05 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 Schneider Electric CPCERT directly for any questions regarding this advisory. Revision History Initial Release Date: 2025-08-12 Date Revision Summary 2025-08-12 1 Original Release 2026-04-14 2 Remediation is available for Modicon M340 2026-08-11 3 Remediation is available for BMXNOR0200H. 2026-09-17 4 Initial CISA Republication of Schneider Electric CPCERT SEVD-2025-224-05 advisory Legal Notice and Terms of Use