Schneider Electric Security Notification
EcoStruxureTM Control Expert, EcoStruxureTM Process Expert,
SCADAPack RemoteConnect™ x70, andModicon Controllers M580 and M340
13 July 2021 (13 August 2024)

Overview
Schneider Electric is aware of multiple vulnerabilities in its EcoStruxure™ Control Expert ,EcoStruxure™ Process Expert, SCADAPack RemoteConnect™ x70, and Modicon M580/ M580
Safety and M340 control products. These vulnerabilities pose several risks, primary among
these is the possibility of arbitrary code execution and loss of confidentiality and integrity of the
project file.
With all products affected an attack would first involve an authenticated user gaining access tothe engineering station; or an unauthenticated user gaining access to a project file or to theprocess control network.
Our findings demonstrate that while the discovered vulnerabilities affect Schneider Electricoffers, it is possible to mitigate the potential impacts by following standard guidance, specificinstructions; and in some cases, the fixes provided by Schneider Electric to remove thevulnerabilities.
Please ensure that if you are an EcoStruxure™ Control Expert user to apply the latest security
updates provided below. For users of any of the mentioned products see the mitigation sectionin this security notice for further information on how to help protect your system from possible
attack.
Schneider Electric encourages all industrial companies to ensure they have implemented
cybersecurity best practices across their operations and supply chains to reduce cyber risks.
Where appropriate this includes locating industrial systems and remotely accessible devices
behind firewalls; installing physical controls to prevent unauthorized access; preventing missioncritical systems and devices from being accessed from outside networks; systematically
applying security patches.
August 2024 Update: A remediation is available on Modicon M580 CPU Safety (page 9).

Note: A Proof-of-Concept script code that could potentially exploit some of these vulnerabilities
has been discovered. Remediation and mitigation actions documented in this notification
document will reduce the risk of exploit.

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Schneider Electric Security Notification
Affected Products & Versions

EcoStruxure™ Control Expert v15.0 SP1

X

2020-12525

2021-22782

2021-22781

2021-22780

2021-22779

Affected Products & Versions

2021-22778

CVE-

X

EcoStruxure™ Control Expert, all versions prior to v15.0 SP1
Including all versions of Unity Pro (former name of EcoStruxure™
Control Expert)

X

X

X

X

X

X

EcoStruxure™ Process Expert, all versions prior to v2021
Including all versions of EcoStruxure™ Hybrid DCS (former name of
EcoStruxure™ Process Expert)

X

X

X

X

X

X

SCADAPack RemoteConnect™ for x70, all versions prior to R2.7.3

X

Modicon M580 CPU (part numbers BMEP* and BMEH*, excluding
M580 CPU Safety), Versions prior to SV4.10
Modicon M580 CPU Safety (part numbers BMEP58*S and
BMEH58*S), Versions prior to SV4.21
Modicon M340 CPU (part numbers BMXP34*), versions prior to v3.50

X

X

X
X
X

Vulnerability Details
CVE ID: CVE-2021-22779
CVSS v3.1 Base Score 9.8 | Critical | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CWE-290: Authentication Bypass by Spoofing vulnerability exists that could cause unauthorizedaccess in read and write mode to the controller by spoofing the Modbus communication
between the engineering software and the controller.
CVE ID: CVE-2021-22778
CVSS v3.1 Base Score 8.6 | High | CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
CWE-522: Insufficiently Protected Credentials vulnerability exists that could cause protected
derived function blocks to be read or modified by unauthorized users when accessing a project
file.

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Schneider Electric Security Notification
CVE ID: CVE-2020-12525
CVSS v3.1 Base Score 7.3 | High | CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H
M&M Software fdtCONTAINER Component in versions below 3.5.20304.x and between 3.6 and3.6.20304.x is vulnerable to deserialization of untrusted data in its project storage.
Note: This vulnerability could cause local code execution on the engineering workstation when amalicious project file is loaded into the engineering software.
CVE ID: CVE-2021-22780
CVSS v3.1 Base Score 7.1 | High | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
CWE-522: Insufficiently Protected Credentials vulnerability exists that could cause unauthorizedaccess to a project file protected by a password when this file is shared with untrusted sources.
An attacker may bypass the password protection and be able to view and modify a project file.
CVE ID: CVE-2021-22781
CVSS v3.1 Base Score 6.2 | Medium | CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
CWE-522: Insufficiently Protected Credentials vulnerability exists that could cause a leak of
SMTP credential used for mailbox authentication when an attacker can access a project file.
CVE ID: CVE-2021-22782
CVSS v3.1 Base Score 6.2 | Medium | CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
CWE-311: Missing Encryption of Sensitive Data vulnerability exists that could cause an
information leak allowing disclosure of network and process information, credentials, or
intellectual property when an attacker can access a project file.

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Schneider Electric Security Notification
Remediations & Mitigations
Affected Product &VersionRemediation & Mitigations
EcoStruxure™ Control Expert v15.1*, available for download below, includes afix for CVE-2021-22778, CVE-2021-22780, CVE-2021-22781, CVE-2021-22782,
CVE-2020-12525, and CVE-2021-22779:
https://www.se.com/ww/en/download/document/EcoStruxureControlExpert_V15.1/* Upgrading to EcoStruxure™ Control Expert v15.1 is the first step in a two steps
process to fully address CVE-2021-22779. The second step is to update thefirmware of the Modicon Controllers referenced.

EcoStruxure™
Control Expert
Versions prior to
v15.1
Including allversions of Unity
Pro (former nameof EcoStruxure™
Control Expert)

Important Note:• The fix is provided through the additional feature “file encryption”, forfurther information on the feature and how to set it up please refers to thechapter “file encryption” of the help file available in the EcoStruxure™
Control Expert v15.0 SP1.
• This feature is proposed by default when creating a new project.
• This feature is also available, after selecting “project” in structural view, in
the “Edit/ Properties/ Project & Controller Protection” menu.
• For new projects: Customers are recommended to apply this feature to
all new projects.
• For existing projects: Customers are recommended to apply this feature
to the existing projects coming from trusted source. For sta project files, asa reminder, project modification can be done in connected mode toprevent desynchronization and keep the controller in RUN state.
• It is possible to set a security level specific to the Derived Function Blocks(DFB) in addition to the file encryption feature. Please refer to the chapter"How to protect a DFB type" in the EcoStruxure™ Control Expert help filefor further information.
• Customers are recommended to share project files only when configured
with the encryption feature described above.
If customers choose not to apply the remediation provided above, they should
immediately apply the following mitigations to reduce the risk of exploit. Thesemitigations also reduce the risk of exploit for CVE-2021-22779 on all versions of
EcoStruxure™ Control Expert, including v15.1:• Store the project files in a secure storage and restrict the access to only
trusted users• When exchanging files over the network, use secure communication
protocols• Encrypt project files when stored• Only open project files received from trusted source• Compute a hash of the project files and regularly check the consistency ofthis hash to verify the integrity before usage• Harden the workstation running EcoStruxure™ Control Expert or Unity Pro

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Schneider Electric Security Notification
Customers using Unity Pro should strongly consider migrating to EcoStruxure™
Control Expert. Please contact your local Schneider Electric technical support for
more information.
EcoStruxure™ Process Expert v2021*, available for download below, includes
a fix for CVE-2021-22778, CVE-2021-22780, CVE-2021-22781, CVE-202122782, CVE-2020-12525, and CVE-2021-22779:
https://www.se.com/myschneider/documentsDownloadCenterDetail/in/en/EPE202
1Release
It is recommended to first review the ReadMe in its entirety before proceedingwith the software installation.
* Upgrading to EcoStruxure™ Process Expert v2021 is the first step in a two
steps process to fully address CVE-2021-22779. The second step is to update thefirmware of the Modicon Controllers referenced.
EcoStruxure™
Process Expert
Versions prior tov2021
Including allversions of
EcoStruxure™
Hybrid DCS (former
name of
EcoStruxure™
Process Expert)

Important Note:• Refer to the instructions provided for EcoStruxure™ Control Expert.
We strongly recommend the use of back-ups and evaluating the impact of thesepatches in a Test and Development environment or on an offline infrastructure.
Contact Schneider Electric’s Customer Care Center if you need assistanceremoving a patch.
If customers choose not to apply the remediation provided above, they should
immediately apply the following mitigations to reduce the risk of exploit. Thesemitigations also reduce the risk of exploit for CVE-2021-22779 on all versions of
EcoStruxure™ Process Expert:• Store the project files in a secure storage and restrict the access to only
trusted users• When exchanging files over the network, use secure communication
protocols• Encrypt project files when stored• Only open project files received from trusted source• Compute a hash of the project files and regularly check the consistency ofthis hash to verify the integrity before usage• Harden the workstation running EcoStruxure™ Process Expert
To ensure you are informed of all security notifications updates, subscribe toSchneider Electric’s security notification service here:
https://www.se.com/en/work/support/cybersecurity/security-notifications.jsp

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Schneider Electric Security Notification
Version R2.7.3 of SCADAPack RemoteConnect™, available for download
below, includes a fix for CVE-2021-22778, CVE-2021-22780, and CVE-202012525:
RemoteConnect for the SCADAPack x70 | Schneider Electric Exchange
Marketplace (se.com)
Important Note:• Refer to the instructions provided for EcoStruxure™ Control Expert.

SCADAPack
RemoteConnect™
Versions prior toR2.7.3We strongly recommend the use of back-ups and evaluating the impact of thesepatches in a Test and Development environment or on an offline infrastructure.
Contact Schneider Electric’s Customer Care Center if you need assistanceremoving a patch.
Note: Users no longer need to update the RemoteConnect™ application when
there is a Control Expert update.
If customers choose not to apply the remediation provided above, they should
immediately apply the following mitigations to reduce the risk of exploit:• Store the project files in a secure storage and restrict the access to only
trusted users• When exchanging files over the network, use secure communication
protocols• Encrypt project files when stored• Only open project files received from trusted source• Compute a hash of the project files and regularly check the consistency ofthis hash to verify the integrity before usage• Harden the workstation running SCADAPack RemoteConnect™

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Schneider Electric Security Notification
Version 3.50 of Modicon M340 is available for download below, includes a fix for
CVE-2021-22779:
https://www.se.com/ww/en/download/document/BMXP34xxxxx_SV_03.50/
Note: It is recommended alongside to following the remediation provided for
EcoStruxure™ Control Expert and make use of application password to ensurecomplete remediation of this issue.
Modicon M340
CPU (partnumbers
BMXP34*)
Versions prior tov3.50

If customers choose not to apply the remediation provided above, they should
immediately apply the following mitigations to reduce the risk of exploit:
Modicon M340:• Setup network segmentation and implement a firewall to block all
unauthorized access to port 502/TCP• Configure the Access Control List following the recommendations of theuser manual “Modicon M340 for Ethernet Communications Modules andProcessors User Manual” in chapter “Messaging Configuration
Parameters”:
https://www.se.com/ww/en/download/document/31007131K01000/• Setup a VPN between the Modicon PLC impacted modules and theengineering workstation containing EcoStruxure™ Control Expert orProcess Expert.

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Schneider Electric Security Notification
Firmware SV4.10 includes a fix for CVE-2021-22779 vulnerability and is available
for download here:
https://www.se.com/ww/en/download/document/BMEx58x0x0_SV04.10/

Modicon M580
CPU (partnumbers BMEP*
and BMEH*,
excluding M580
CPU Safety)
Versions prior toSV4.10If customers choose not to apply the remediation then they are encouraged to
immediately apply the following mitigations to reduce the risk of exploit:• Setup network segmentation and implement a firewall to block all
unauthorized access to port 502/TCP• Configure the Access Control List following the recommendations of theuser manual “Modicon M580, Hardware, Reference Manual”:
https://www.se.com/ww/en/download/document/EIO0000001578/• Setup a secure communication according to the following guideline“ModiconControllers Platform Cyber Security Reference Manual,” in chapter “Setup
secured communications”:
https://www.se.com/ww/en/download/document/EIO0000001999/• Use a BMENOC module and follow the instructions to configure IPSEC
feature as described in the guideline “Modicon M580 – BMENOC03.1
Ethernet Communications Schneider Electric Security Notification Module,
Installation and Configuration Guide” in the chapter “Configuring IPSEC
communications”:
https://www.se.com/ww/en/download/document/HRB62665/• Setup a VPN between the Modicon PLC impacted modules and theengineering workstation containing EcoStruxure™ Control Expert orProcess Expert.
• Ensure the CPU is running with the memory protection activated byconfiguring the input bit to a physical input , for more details refer to thefollowing guideline “Modicon Controllers Platform Cyber Security
Reference Manual”, “CPU Memory Protection section”:
https://www.schneiderelectric.com/en/download/document/EIO0000001999/
o NOTE: The CPU memory protection cannot be configured with Hot
Standby CPUs. In such cases, use IPsec encrypted
communication

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Schneider Electric Security Notification
Firmware SV4.21 includes a fix for CVE-2021-22779 vulnerability and is available
for download here:

https://www.se.com/ww/en/product-range/62098-modicon-m580-paccontroller/#software-and-firmware
Important: customer needs to use version of EcoStruxure™ Control Expert v16.0
HF001 minimum to connect with the latest version of M580 CPU Safety. The
software is available for download here:
https://www.se.com/ww/en/product-range/548-ecostruxure-control-expert-unitypro/#software-and-firmware

Modicon M580
CPU Safety(part numbers
BMEP58*S and
BMEH58*S)
Versions prior toSV4.21

If customers choose not to apply the remediation then they are encouraged to
immediately apply the following mitigations to reduce the risk of exploit• Setup network segmentation and implement a firewall to block all
unauthorized access to port 502/TCP• Configure the Access Control List following the recommendations of theuser manual “Modicon M580, Hardware, Reference Manual”:
https://www.se.com/ww/en/download/document/EIO0000001578/• Setup a secure communication according to the following guideline“Modicon Controllers Platform Cyber Security Reference Manual,” inchapter “Setup secured communications”:
https://www.se.com/ww/en/download/document/EIO0000001999/• Use a BMENUA0100 module and follow the instructions to configure
IPSEC feature as described in the chapter “Configuring the BMENUA0100
Cybersecurity Settings”:
https://www.se.com/ww/en/download/document/PHA83350• Setup a VPN between the Modicon PLC impacted modules and theengineering workstation containing EcoStruxure™ Control Expert orProcess Expert.
• Ensure the CPU is running with the memory protection activated byconfiguring the input bit to a physical input , for more details refer to thefollowing guideline “Modicon Controllers Platform Cyber Security
Reference Manual”, “CPU Memory Protection section”:
https://www.schneiderelectric.com/en/download/document/EIO0000001999/
o NOTE: The CPU memory protection cannot be configured with Hot
Standby CPUs. In such cases, use IPsec encrypted
communication
To further reduce the attack surface on Modicon M580 CPU Safety:• Ensure the CPU is running in Safety mode and maintenance input isconfigured to maintain this Safety mode during operation – refer to the
document Modicon M580 - Safety System Planning Guide - in thechapter “Operating Mode Transitions”:
https://www.se.com/ww/en/download/document/QGH60283/

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Schneider Electric Security Notification
To ensure you are informed of all security notifications updates, subscribe to Schneider
Electric’s security notification service here:
https://www.se.com/en/work/support/cybersecurity/security-notifications.jsp
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 if you need assistance removing a patch.

General Security Recommendations
We strongly recommend the following industry cybersecurity best practices.
•
•
•
•
•
•
•
•
•
•

•

Ensure the cybersecurity features in Schneider Electric solutions are always enabled.
Locate control and safety system networks and remote devices behind firewalls andisolate 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 when applicable do not leave them in the“Program” mode.
Never connect programming software and engineering workstations to any network
other than the network that it is intended.
ICS networks should be appropriately partitioned, and not directly connected to businessnetworks or the Internet.
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 theintended network to connect to the safety or control networks without proper sanitation.
Minimize network exposure for all control system devices and systems and ensure thatthey 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 themost current version available. Also, understand that VPNs are only as secure as theconnected devices.
Customers are encouraged to implement best practices covered in the Top 20 Secure
PLC Coding Practices to help improve the security posture of their Industrial Control
Systems.

For more information refer to the Schneider Electric Recommended Cybersecurity Best
Practices document.

Acknowledgements

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Schneider Electric Security Notification
Schneider Electric recognizes the following researchers for identifying and helping to coordinate
a response to these vulnerabilities:
CVE

CVE-2021-22779

Researchers
Kai Wang (Fortinet’s FortiGuard Labs)
Nicholas Miles (Tenable)
Andrey Muravitsky (Kaspersky ICS CERT)Gal Kauffman (Armis)
Li Wei (Friday Lab – Bolean Tech)

CVE-2021-22780

Kai Wang (Fortinet’s FortiGuard Labs)
Maxim Tumakov (Kaspersky ICS CERT)

CVE-2021-22781

Kai Wang (Codesafe Team of Legendsec at Qi’anxin Group)CVE-2021-22782

Maxim Tumakov (Kaspersky ICS CERT)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. These organizations will be fully aware of this situation and can support you throughthe process.
https://www.se.com/ww/en/work/support/cybersecurity/overview.jsp
https://www.se.com/ww/en/work/services/field-services/industrial-automation/industrialcybersecurity/industrial-cybersecurity.jsp
LEGAL DISCLAIMER
THIS NOTIFICATION DOCUMENT, THE INFORMATION CONTAINED HEREIN, AND ANY MATERIALSLINKED 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 ELECTRICDISCLAIMS 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 SUCHDAMAGES. YOUR USE OF THIS NOTIFICATION IS AT YOUR OWN RISK, AND YOU ARE SOLELYLIABLE FOR ANY DAMAGES TO YOUR SYSTEMS OR ASSETS OR OTHER LOSSES THAT MAY

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Schneider Electric Security Notification
RESULT FROM YOUR USE OF THIS NOTIFICATION. SCHNEIDER ELECTRIC RESERVES THE RIGHTTO UPDATE OR CHANGE THIS NOTIFICATION AT ANY TIME AND IN ITS SOLE DISCRETION.
About Schneider Electric
Schneider’s purpose is to empower all to make the most of our energy and resources, bridging progress andsustainability for all. We call this Life Is On.
Our mission is to be your digital partner for Sustainability and Efficiency.
We drive digital transformation by integrating world-leading process and energy technologies, end-point to cloudconnecting products, controls, software and services, across the entire lifecycle, enabling integrated company
management, for homes, buildings, data centers, infrastructure and industries.
We are the most local of global companies. We are advocates of open standards and partnership ecosystems thatare passionate about our shared Meaningful Purpose, Inclusive and Empowered values.
www.se.com

Revision Control:
Version 1.0.0
13 Jul 2021

Original Release

Version 2.0.0
08 March 2022

A release is available for EcoStruxure™ Control Expert v15.1 andEcoStruxure™ Process Expert 2021 that addresses workstation
vulnerabilities related to the issues listed below. A subsequent
release is planned to address the Modicon M580 and Modicon M340
PLC’s to complete the remediations.

Version 3.0.0
12 April 2022

A release is available for Modicon M340 controllers that addresses
CVE-2021-22779, in conjunction with the latest release of
EcoStruxure™ Control Expert. Subsequent firmware releases areplanned to address the Modicon M580 PLC’s to complete theremediations that will fix CVE-2021-22779.

Version 4.0.0
12 July 2022

A release is available for SCADAPack RemoteConnect™ R2.7.3 that
addresses workstation vulnerabilities related to the issues listed. It
has been determined that SCADAPack RemoteConnect™ versions
prior to R2.7.3 are not affected by CVE-2021-22779, CVE-202122781, CVE-2021-22782.

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Schneider Electric Security Notification

Version 5.0.0
09 August 2022

A fix is available for Modicon M580 CPU (part numbers BMEP* andBMEH*).
Note that a complete remediation is a two-step process and will
require an upgrade of the engineering software: EcoStruxure™
Control Expert, EcoStruxure™ Process Expert or SCADAPack
RemoteConnect™, in addition to an upgrade of the Modicon
controller firmware: M340 and M580.
EcoStruxure™ Control Expert V15.1 and EcoStruxure™ Process
Expert V2021 include a fix for the vulnerabilities reported in thisdocument and have been removed from the affected products list.

Version 5.1.0
06 September 2022

The version number for Modicon M580 that addresses thesevulnerabilities has been updated from SV4.01 to SV4.02.

Version 6.0.0
11 October 2022

Version 7.0.0
13 December 2022

Adding a clarification to the list of affected products by splitting
Modicon M580 and Modicon M580 Safety CPU ranges. The purposeof the notification update is to inform customers that the latest fix
Modicon M580 SV4.02 does not apply to the Safety range of M580. It
is highly recommended that customers using Modicon M580 Safety
ranges continue to implement the mitigations shared in thisdocument.
The Modicon M580 SV4.02 firmware has been retracted for quality
issues and is no longer available for download. Additional mitigations
have been introduced for Modicon M580 CPU and M580 CPU Safety,
and we urge customers to deploy these mitigations to further reduce
the risk of potential exploitation of identified vulnerabilities.

Version 8.0.0
14 March 2023

Remediation for the Modicon M580 CPU is available for download.

Version 9.0.0
13 August 2024

A remediation is available for the Modicon M580 CPU Safety (page 9)

CPCERT

Digitally signed by CPCERT
Date: 2024.08.12 12:51:41 -04'00'

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