Schneider Electric Security Bulletin
KNX Systems Publicly Available Exploit
26 April 2023
Overview
Schneider Electric is aware of a publicly available exploit affecting KNX home and building
automation systems. The products used in these systems may come from a variety of different
vendors, including Schneider Electric spaceLYnk, Wiser for KNX (formerly homeLYnk), andFellerLYnk products. The exploit consists of direct access to product functions and brute force
attacks on the panel, which may lead to unauthorized access to product features.
Details
The exploit released takes advantage of two vulnerabilities affecting KNX home and building
automation systems. Amongst the products targeted, Schneider Electric was able to identify its
spaceLYnk and Wiser for KNX (formerly homeLYnk) products in the Proof-of-Concept details.
FellerLYnk is impacted.
The first vulnerability is direct access to the product functions Touch, Schedulers, andVisualization without authentication. It was disclosed by Schneider Electric in February 2022
under CVE-2022-22809. The security notification SEVD-2022-039-04 provides remediation forboth products in V2.7.0.
The second vulnerability is a brute force attack against the PIN panel. It was disclosed bySchneider Electric in August 2020 under CVE-2020-7525. The security notification SEVD-2020224-02 provides remediation for both products in V2.5.1.
Both vulnerabilities were fixed in the latest version of spaceLYnk and Wiser for KNX (formerlyhomeLYnk), although old versions of products improperly exposed to the Internet by end-users
have been reported.
In November 2021, Schneider Electric released a security bulletin when made aware of cyberattacks on KNX products. This new exploit brings further attention to the recommended
mitigations in that security bulletin.
Recommended Remediations
We urge our customers to follow the remediations and Wiser for KNX, SpaceLYnk- System
Hardening Guideline to be safe from the attack.
We recommend upgrading to the latest products version to ensure the latest security features
available:•homeLYnk (Wiser For KNX) – https://www.se.com/ww/en/product/LSS100100/wiser-forknx-logic-controller/#pdp-software

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Document Reference Number – SESB-2023-01-KNX

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Schneider Electric Security Bulletin••spaceLYnk – https://www.se.com/ww/en/product/LSS100200/spacelynk-logiccontroller/#pdp-software
Fellerlynk – https://onlinekatalog.feller.ch/download/index.php?menueidLev1=279&menueidLev2=662&menueidL
ev3=664

If it is suspected that your KNX system with Schneider Electric KNX endpoints has been
compromised, please contact Schneider Electric’s Customer Care Center.
Customers should use appropriate patching methodologies when applying these patches totheir systems. 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 assistance removing a patch.
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 befully aware of this situation and can support you through the process.
For further information related to cybersecurity in Schneider Electric’s products, visit thecompany’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 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 THEIDENTIFIED SITUATION. IN NO EVENT SHALL SCHNEIDER ELECTRIC BE LIABLE FOR ANYDAMAGES OR LOSSES WHATSOEVER IN CONNECTION WITH THIS NOTIFICATION, INCLUDINGDIRECT, INDIRECT, INCIDENTAL, CONSEQUENTIAL, LOSS OF BUSINESS PROFITS OR SPECIALDAMAGES, 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 MAYRESULT FROM YOUR USE OF THIS NOTIFICATION. SCHNEIDER ELECTRIC RESERVES THE RIGHTTO UPDATE OR CHANGE THIS NOTIFICATION AT ANY TIME AND IN ITS SOLE DISCRETION26-Apr-23Document Reference Number – SESB-2023-01-KNXPage 2 of 3Schneider Electric Security Bulletin
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
26 April 2023

Original Releasesigned by Product Security Office
Product Security Office Digitally
Date: 2023.04.25 13:18:14 -04'00'

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Document Reference Number – SESB-2023-01-KNX

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