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Schneider Electric Modicon M340, BMXNOE0100, and BMXNOE0110 (Update A)

MEDIUM
CVSS 6.5
Date 2026-06-09T06:00:00+00:00
Source cisa-csaf
Published by CISA

// Description

We strongly recommend the following industry cybersecurity best practices. https://www.se.com/us/en/download/document/7EN52-0390/ * 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.

// Vulnerabilities (1)

CVE ID CVSS Score Severity Description
CVE-2024-5056 6.5 medium
CVE-2024-5056. CWE-552: Files or Directories Accessible to External Parties vulnerability exists which may prevent user to update the device firmware and prevent proper behavior of the webserver when specific files or directories are removed from the filesystem.

// Affected Products (3)

Vendor Product Asset Type Purdue Level Firmware
Schneider Electric Unknown plc
L1
--
Schneider Electric Unknown plc
L1
--
Schneider Electric Unknown plc
L1
--

// Remediations (4)

Mitigation: If customers choose not to apply the remediation provided above, they should immediately apply the
If customers choose not to apply the remediation provided above, they should immediately apply the following mitigations to reduce the risk of exploit: • Setup network segmentation and implement a firewall to block all unauthorized access to FTP port 21/TCP on the devices. • FTP service is disabled by default. Deactivate the FTP service after use when not needed. • Configure the Access Control List following the recommendations of the user manuals: o “Modicon M340 for Ethernet Communications Modules and Processors User Manual” in chapter “Messaging Configuration Parameters”: https://www.se.com/ww/en/download/document/31 007131K01000/
Patch: Version SV6.80 of BMXNOE0110 includes a fix for this vulnerability and is available for download he
Version SV6.80 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/
Patch: Version SV3.70 of Modicon M340 includes a fix for this vulnerability and is available for download h
Version 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
Patch: Version SV3.60 of BMXNOE0100 includes a fix for this vulnerability and is available for download he
Version SV3.60 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

// References