ICSA-26-078-01
Vulnerability from csaf_cisa - Published: 2026-03-10 07:00 - Updated: 2026-03-19 06:00Summary
Schneider Electric Modicon M241, M251, and M262
Notes
General Security Recommendations: 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.
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
Overview: Schneider Electric is aware of a vulnerability in its Modicon Controllers M241 / M251, and M262 products.
The Modicon Controllers M241 / M251 / M262 are Programmable Logic Controllers for performancedemanding applications.
Failure to apply the remediation provided below may risk Denial of Service attack which could result in loss of
availability of the controller
The severity of vulnerabilities was calculated using the CVSS Base metrics for 4.0 ([CVSS v4.0](https://www.first.org/cvss/calculator/4.0)). CVSS v3.1
will be still evaluated until the adoption of CVSS v4.0 by the industry. The severity was calculated without
incorporating the Temporal and Environmental metrics. Schneider Electric recommends that customers score the CVSS Environmental metrics, which are specific to end-user organizations, and consider factors such as
the presence of mitigations in that environment. Environmental metrics may refine the relative severity posed by the vulnerabilities described in this document within a customer's environment.
Customers should use appropriate patching methodologies when applying these patches to their systems. We strongly recommend the use of back-ups and evaluating the impact of these patches in a Test and Development environment or on an offline infrastructure. Contact Schneider Electric's [Customer Care Center](https://www.se.com/us/en/work/support/contacts.jsp) if you need assistance removing a patch.
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 Schneider Electric CPCERT SEVD-2026-069-01 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.
Critical infrastructure sectors: Commercial Facilities, Critical Manufacturing, Energy
Countries/areas deployed: Worldwide
Company headquarters location: France
Recommended Practices: CISA recommends users take defensive measures to minimize the exploitation risk of these vulnerabilities.
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.
CWE-404 Improper Resource Shutdown or Release vulnerability exists that could cause partial Denial of Service on Machine Expert protocol when an unauthenticated attacker sends malicious payload to occupy active communication channels.
5.3 (Medium)
Vendor Fix
Modicon Controller M241 Firmware version 5.4.13.12 delivered with
EcoStruxure™ Machine Expert v2.5.0.1 includes a fix for this vulnerability and can
be installed through Schneider Electric Software Installer available here:
https://www.se.com/ww/en/download/document/ESEMACS10_INSTALLER/
On the engineering workstation install v2.5.0.1 of EcoStruxure™ Machine Expert.
For help refer to Schneider Electric Software Installer User Guide available here:
https://www.se.com/ww/en/download/document/EIO0000005500/
Update Modicon Controller M241 to the latest Firmware and perform reboot. For
instructions refer to Modicon M241 Logic Controller, Programming Guide:
https://www.se.com/ww/en/download/document/EIO0000003059/
https://www.se.com/ww/en/download/document/ESEMAC…
Vendor Fix
Modicon Controller M251 Firmware version 5.4.13.12 delivered with
EcoStruxure™ Machine Expert v2.5.0.1 includes a fix for this vulnerability and can
be installed through Schneider Electric Software Installer available here:
https://www.se.com/ww/en/download/document/ESEMACS10_INSTALLER/
On the engineering workstation install v2.5.0.1 of EcoStruxure™ Machine Expert.
For help refer to Schneider Electric Software Installer User Guide available here:
https://www.se.com/ww/en/download/document/EIO0000005500/
Update Modicon Controller M251 to the latest Firmware and perform reboot. For
instructions refer to Modicon M251 Logic Controller, Programming Guide:
https://www.se.com/ww/en/download/document/EIO0000003089/
https://www.se.com/ww/en/download/document/ESEMAC…
Vendor Fix
Modicon Controller M262 Firmware version 5.4.10.12 delivered with
EcoStruxure™ Machine Expert v2.5 includes a fix for this vulnerability and can be
installed through Schneider Electric Software Installer available here:
https://www.se.com/ww/en/download/document/ESEMACS10_INSTALLER/
On the engineering workstation install v2.5.0.1 of EcoStruxure™ Machine Expert.
For help refer to Schneider Electric Software Installer User Guide available here:
https://www.se.com/ww/en/download/document/EIO0000005500/
Update Modicon Controller M262 to the latest Firmware and perform reboot. For
instructions refer to Modicon M262 Logic/Motion Controller, Programming Guide:
https://www.se.com/ww/en/download/document/EIO0000003651/
https://www.se.com/ww/en/download/document/ESEMAC…
Mitigation
If customers choose not to apply the remediation provided above, they should immediately apply the following mitigations to reduce the risk of exploit: Use controllers and devices only in a protected environment to
minimize network exposure and ensure that they are not
accessible from public internet or untrusted networks.
• Filter ports and IP through the embedded firewall.
• Use encrypted communication links.
• Use VPN (Virtual Private Networks) tunnels if remote access is
required.
• The “Cybersecurity Guidelines for EcoStruxure Machine Expert,
Modicon and PacDrive Controllers and Associated Equipment”
provide product specific hardening guidelines
https://download.schneider-electric.com/files?p_e…
References
Acknowledgments
Schneider Electric CPCERT
Claroty
Noam Moshe
Claroty
Noam Moshe
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"category": "installed_on",
"full_product_name": {
"name": "Modicon M251 Firmware Version 5.4.13.12 installed on Modicon Controller M251",
"product_id": "CSAFPID-0014"
},
"product_reference": "CSAFPID-0005",
"relates_to_product_reference": "CSAFPID-0008"
},
{
"category": "installed_on",
"full_product_name": {
"name": "Modicon M262 Firmware Version 5.4.10.12 installed on Modicon Controller M262",
"product_id": "CSAFPID-0015"
},
"product_reference": "CSAFPID-0006",
"relates_to_product_reference": "CSAFPID-0009"
}
]
},
"vulnerabilities": [
{
"acknowledgments": [
{
"names": [
"Noam Moshe"
],
"organization": "Claroty"
}
],
"cve": "CVE-2025-13901",
"cwe": {
"id": "CWE-404",
"name": "Improper Resource Shutdown or Release"
},
"notes": [
{
"category": "description",
"text": "CWE-404 Improper Resource Shutdown or Release vulnerability exists that could cause partial Denial of \r\nService on Machine Expert protocol when an unauthenticated attacker sends malicious payload to occupy \r\nactive communication channels.",
"title": "CVE Description"
},
{
"category": "details",
"text": "CVSS v4.0 Base Score 6.9 | Medium | [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N](https://www.first.org/cvss/calculator/4.0#CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N)",
"title": "CVSS v4.0 Score"
}
],
"product_status": {
"fixed": [
"CSAFPID-0013",
"CSAFPID-0014",
"CSAFPID-0015"
],
"known_affected": [
"CSAFPID-0010",
"CSAFPID-0011",
"CSAFPID-0012"
]
},
"references": [
{
"category": "external",
"summary": "www.cve.org",
"url": "https://www.cve.org/CVERecord?id=CVE-2025-13901"
},
{
"category": "external",
"summary": "cwe.mitre.org",
"url": "https://cwe.mitre.org/data/definitions/404.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:L"
}
],
"remediations": [
{
"category": "vendor_fix",
"details": "Modicon Controller M241 Firmware version 5.4.13.12 delivered with \r\nEcoStruxure\u2122 Machine Expert v2.5.0.1 includes a fix for this vulnerability and can \r\nbe installed through Schneider Electric Software Installer available here: \r\nhttps://www.se.com/ww/en/download/document/ESEMACS10_INSTALLER/\r\nOn the engineering workstation install v2.5.0.1 of EcoStruxure\u2122 Machine Expert. \r\nFor help refer to Schneider Electric Software Installer User Guide available here: \r\nhttps://www.se.com/ww/en/download/document/EIO0000005500/\r\nUpdate Modicon Controller M241 to the latest Firmware and perform reboot. For \r\ninstructions refer to Modicon M241 Logic Controller, Programming Guide: \r\nhttps://www.se.com/ww/en/download/document/EIO0000003059/",
"product_ids": [
"CSAFPID-0010"
],
"restart_required": {
"category": "system"
},
"url": "https://www.se.com/ww/en/download/document/ESEMACS10_INSTALLER/"
},
{
"category": "vendor_fix",
"details": "Modicon Controller M251 Firmware version 5.4.13.12 delivered with \r\nEcoStruxure\u2122 Machine Expert v2.5.0.1 includes a fix for this vulnerability and can \r\nbe installed through Schneider Electric Software Installer available here: \r\nhttps://www.se.com/ww/en/download/document/ESEMACS10_INSTALLER/\r\nOn the engineering workstation install v2.5.0.1 of EcoStruxure\u2122 Machine Expert. \r\nFor help refer to Schneider Electric Software Installer User Guide available here: \r\nhttps://www.se.com/ww/en/download/document/EIO0000005500/\r\nUpdate Modicon Controller M251 to the latest Firmware and perform reboot. For \r\ninstructions refer to Modicon M251 Logic Controller, Programming Guide: \r\nhttps://www.se.com/ww/en/download/document/EIO0000003089/",
"product_ids": [
"CSAFPID-0011"
],
"restart_required": {
"category": "system"
},
"url": "https://www.se.com/ww/en/download/document/ESEMACS10_INSTALLER/"
},
{
"category": "vendor_fix",
"details": "Modicon Controller M262 Firmware version 5.4.10.12 delivered with \r\nEcoStruxure\u2122 Machine Expert v2.5 includes a fix for this vulnerability and can be \r\ninstalled through Schneider Electric Software Installer available here: \r\nhttps://www.se.com/ww/en/download/document/ESEMACS10_INSTALLER/\r\nOn the engineering workstation install v2.5.0.1 of EcoStruxure\u2122 Machine Expert. \r\nFor help refer to Schneider Electric Software Installer User Guide available here: \r\nhttps://www.se.com/ww/en/download/document/EIO0000005500/\r\nUpdate Modicon Controller M262 to the latest Firmware and perform reboot. For \r\ninstructions refer to Modicon M262 Logic/Motion Controller, Programming Guide: \r\nhttps://www.se.com/ww/en/download/document/EIO0000003651/",
"product_ids": [
"CSAFPID-0012"
],
"restart_required": {
"category": "system"
},
"url": "https://www.se.com/ww/en/download/document/ESEMACS10_INSTALLER/"
},
{
"category": "mitigation",
"details": "If customers choose not to apply the remediation provided above, they should immediately apply the following mitigations to reduce the risk of exploit: Use controllers and devices only in a protected environment to \r\nminimize network exposure and ensure that they are not \r\naccessible from public internet or untrusted networks.\r\n\u2022 Filter ports and IP through the embedded firewall.\r\n\u2022 Use encrypted communication links.\r\n\u2022 Use VPN (Virtual Private Networks) tunnels if remote access is \r\nrequired. \r\n\u2022 The \u201cCybersecurity Guidelines for EcoStruxure Machine Expert, \r\nModicon and PacDrive Controllers and Associated Equipment\u201d \r\nprovide product specific hardening guidelines",
"product_ids": [
"CSAFPID-0010",
"CSAFPID-0011",
"CSAFPID-0012"
],
"restart_required": {
"category": "none"
},
"url": "https://download.schneider-electric.com/files?p_enDocType=User+guide\u0026p_File_Name=EIO0000004242.00.pdf\u0026p_Doc_Ref=EIO0000004242"
}
],
"scores": [
{
"cvss_v3": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "LOW",
"baseScore": 5.3,
"baseSeverity": "MEDIUM",
"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:L",
"version": "3.1"
},
"products": [
"CSAFPID-0010",
"CSAFPID-0011",
"CSAFPID-0012"
]
}
],
"title": "CVE-2025-13901"
}
]
}
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Sightings
| Author | Source | Type | Date |
|---|
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.
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