Schneider Electric Easergy MiCOM Px40 Series

Summary

Schneider Electric has identified a vulnerability (CVE-2026-4832) in its Easergy MiCOM Px40 Series protection relays. This flaw, stemming from the use of hard-coded credentials, could allow unauthenticated attackers to gain unauthorized access to basic device identification information via the SNMP protocol. Affected versions span multiple sub-series, and mitigations include network isolation, firewalling, VPN usage, or firmware upgrades to disable SNMP.

Full text

ICS Advisory Schneider Electric Easergy MiCOM Px40 Series Release DateJuly 09, 2026 Alert CodeICSA-26-190-03 Related topics: Industrial Control System Vulnerabilities , Industrial Control Systems View CSAF Summary Schneider Electric is aware of a vulnerability in its Easergy MiCOM Px40 Series products. The [Easergy MiCOM Px40](https://www.se.com/ww/en/product-subcategory/4725-easergy-micom-px40-series/?filter=business-6-medium-voltage-distribution-and-grid-automation) is a protection relay series for Medium Voltage, High Voltage and Extra High Voltage protection. Failure to apply the mitigations provided below may risk unauthorized exposure of basic device identification through the SNMP protocol. The following versions of Schneider Electric Easergy MiCOM Px40 Series are affected: Easergy MiCOM P14x All versions prior to B4A Easergy MiCOM P24x All versions prior to D3A Easergy MiCOM P341 All versions prior to E3F Easergy MiCOM P342, P343, P344, P345 All versions prior to B3F Easergy MiCOM P442, P444 All versions prior to E3A Easergy MiCOM P443, P445, P446, P543, P544, P545, P546 All versions prior to H6A Easergy MiCOM P841 All versions prior to G6A Easergy MiCOM P643 All versions prior to B3F Easergy MiCOM P642, P645 All versions prior to B4A Easergy MiCOM P741, P742, P743 All versions prior to B2A Easergy MiCOM P746 All versions prior to B4E Easergy MiCOM P746 All versions prior to C4E Easergy MiCOM P849 All versions prior to B4A CVSS Vendor Equipment Vulnerabilities v3 5.3 Schneider Electric Schneider Electric Easergy MiCOM Px40 Series Use of Hard-coded Credentials Background Critical Infrastructure Sectors: Critical Manufacturing, Energy, Transportation Systems Countries/Areas Deployed: Worldwide Company Headquarters Location: France Vulnerabilities Expand All + CVE-2026-4832 CWE-798 Use of Hard-coded Credentials vulnerability exists that could cause unauthorized access to sensitive device information when an unauthenticated attacker is able to interrogate the SNMP port. View CVE Details Affected Products Schneider Electric Easergy MiCOM Px40 Series Vendor:Schneider Electric Product Version:Easergy MiCOM P14x All versions prior to B4A, Easergy MiCOM P24x All versions prior to D3A, Easergy MiCOM P341 All versions prior to E3F, Easergy MiCOM P342, P343, P344, P345 All versions prior to B3F, Easergy MiCOM P442 P444 All versions prior to E3A, Easergy MiCOM P443, P445, P446, P543, P544, P545, P546 All versions prior to H6A, Easergy MiCOM P841 All versions prior to G6A, Easergy MiCOM P643 All versions prior to B3F, Easergy MiCOM P642, P645 All versions prior to B4A, Easergy MiCOM P741, P742, P743 All versions prior to B2A, Easergy MiCOM P746 All versions prior to B4E, Easergy MiCOM P746 All versions prior to C4E, Easergy MiCOM P849 All versions prior to B4A Product Status:known_affected Remediations MitigationFor customers who do not require SNMP Contact Schneider Electric's [Customer Care Center](https://www.se.com/ww/en/work/support/contacts.jsp) to upgrade the Firmware to a version without SNMP functionality. If customers choose not to apply the upgrade provided above, they should immediately apply the following mitigations to reduce the risk of exploit: * Use relays only in a protected network environment, * Use firewalls to protect and separate the control system network from other networks, * Use VPN (Virtual Private Networks) tunnels if remote access is required. For customers who require SNMP Please immediately apply the following mitigations to reduce the risk of exploit: * Use relays only in a protected network environment, * Use firewalls to protect and separate the control system network from other networks, * Use VPN (Virtual Private Networks) tunnels if remote access is required. Relevant CWE: CWE-798 Use of Hard-coded Credentials Metrics CVSS Version Base Score Base Severity Vector String 3.1 5.3 MEDIUM CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N 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](https://www.se.com/us/en/download/document/7EN52-0390/) 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,

Indicators of Compromise

• cve — CVE-2026-4832

Entities