ABB Advant Master Online Builder

Summary

ABB has identified a vulnerability in its Advant Master Online Builder software, specifically CVE-2025-13162. This flaw, caused by improper handling of search paths for DLLs, could allow an attacker with system access to execute arbitrary code. ABB has released updated versions to address the issue and recommends customers update their systems.

Full text

ICS Advisory ABB Advant Master Online Builder Release DateJuly 14, 2026 Alert CodeICSA-26-195-01 Related topics: Industrial Control System Vulnerabilities , Industrial Control Systems View CSAF Summary ABB became aware of vulnerability in the products versions listed as affected in the advisory, where an incorrect version of Online Builder (ONB) was included in the media. An update is available that resolves the vulnerability, see details in Recommended immediate actions. The following versions of ABB Advant Master Online Builder are affected: Control Builder A <=1.4/4 (CVE-2025-13162) 800xA for Advant Master <=6.0.3-1, <=6.1.1-1, 6.1.1-3, 6.2.0-1 (CVE-2025-13162, CVE-2025-13162, CVE-2025-13162, CVE-2025-13162) CVSS Vendor Equipment Vulnerabilities v3 4.4 ABB ABB Advant Master Online Builder Uncontrolled Search Path Element Background Critical Infrastructure Sectors: Critical Manufacturing Countries/Areas Deployed: Worldwide Company Headquarters Location: Switzerland Vulnerabilities Expand All + CVE-2025-13162 The application improperly handles the search path for loading DLL´s, potentially allowing unauthorized libraries from untrusted directories. An attacker who obtains the necessary access could exploit the vulnerability leading to unauthorized code execution and compromising system integrity. View CVE Details Affected Products ABB Advant Master Online Builder Vendor:ABB Product Version:ABB Control Builder A <=1.4/4, ABB 800xA for Advant Master <=6.0.3-1, ABB 800xA for Advant Master <=6.1.1-1, ABB 800xA for Advant Master 6.1.1-3, ABB 800xA for Advant Master 6.2.0-1 Product Status:known_affected Remediations Vendor fixABB has investigated the vulnerability and remediated it in the newly released versions. The vulnerability has been resolved in the product versions listed as fixed in the advisory. - Version 6.1.1-2 does not contain this vulnerability and therefore no update is required. The vulnerability was again introduced in 6.1.1-3 when an older ONB version was included in the release media. - Version 6.1.1-4 do not contain this vulnerability but present version 6.1.1-3 by 800xA System Installer and System Configuration Console (SCC). Version 6.1.1-4 is therefore withdrawn. - Version 6.2.0-2 do not contain this vulnerability but present version 6.2.0-1 by 800xA System Installer and System Configuration Console (SCC). Version 6.2.0-2 is therefore withdrawn. ABB recommends that customers apply the update at their earliest convenience. - Control Builder A: It is recommended to update Control Builder A to version 1.4/5 or later. - 800xA for Advant Master: - Versions 6.0.3-1 and earlier, - Versions 6.1.1-1 and earlier, - Versions 6.1.1-2, 6.1.1-3, and 6.1.1-4 should be updated to version 6.1.1-5 or later. - 800xA for Advant Master: - Versions 6.2.0-1 and 6.2.0-2 should be updated to version 6.2.0-3 or later. MitigationSince it is required that the attacker has access to the system, it is important that all users that have access to the system are managed as recommended by ABB guidelines. - Allow only authorized users to log on to the system and enforce strong passwords that are changed regularly. - Restrict temporary connection of portable computers, USB memory devices and other removable data carriers. Computers that can be physically accessed by regular users should have ports for removable data carriers disabled or at least managed to only allow intended device types. For more information on recommended practices, see [1]. WorkaroundThe recommendation is to upgrade to a version where the vulnerability is corrected. If an upgrade Is not possible and a workaround is needed, contact ABB Support. Relevant CWE: CWE-427 Uncontrolled Search Path Element Metrics CVSS Version Base Score Base Severity Vector String 3.1 4.4 MEDIUM CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:N/I:H/A:N Acknowledgments ABB PSIRT reported this vulnerability to CISA. Notice The information in this document is subject to change without notice, and should not be construed as a commitment by ABB. ABB provides no warranty, express or implied, including warranties of merchantability and fitness for a particular purpose, for the information contained in this document, and assumes no responsibility for any errors that may appear in this document. In no event shall ABB or any of its suppliers be liable for direct, indirect, special, incidental or consequential damages of any nature or kind arising from the use of this document, or from the use of any hardware or software described in this document, even if ABB or its suppliers have been advised of the possibility of such damages. This document and parts hereof must not be reproduced or copied without written permission from ABB, and the contents hereof must not be imparted to a third party nor used for any unauthorized purpose. All rights to registrations and trademarks reside with their respective owners. Frequently Asked Questions What is the scope of vulnerability? - An attacker who successfully exploited this vulnerability could insert and run arbitrary code in an affected system node. What causes the vulnerability? - The vulnerability is caused by not having restricted permission on an application directory where DLL files are stored. What is Advant Master Online Builder? - Online Builder is part of Control Builder A, being a set of applications for configuration and programming of Advant Master controllers. Online Builder is also part of 800xA for Advant Master, an extension package to System 800xA connecting to Advant Master controllers. What might an attacker use the vulnerability to do? - An attacker who successfully exploited this vulnerability can run arbitrary code in an affected node. How could an attacker exploit the vulnerability? - An attacker who obtains the necessary access could exploit vulnerability by placing malicious DLL´s in the unrestricted application directory, leading to unauthorized code execution and compromising system integrity. Could the vulnerability be exploited remotely? - No, to exploit this vulnerability an attacker would need to have physical access to an affected system node. Can functional safety be affected by an exploit of this vulnerability? - No. What does the update do? - The update of the Online Builder (ONB) resolves the vulnerability by adding restrictions to the application folder, requiring authentication. When this security advisory was issued, had this vulnerability been publicly disclosed? - No, ABB identified this vulnerability through its internal security assessment and verification processes. When this security advisory was issued, had ABB received any reports that this vulnerability was being exploited? - No, ABB had not received any information indicating that this vulnerability had been exploited when this security advisory was originally issued. 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). Recommended Practices CISA recommends users take defensive measures to minimize the exploitation risk of these vulnerabilities. Minimize network exposure for all control system devices and/or systems, and ensure they are not accessible from the internet. Locate control system networks and remote devices behind firewalls and isolate them from business networks. 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. CISA reminds organizations to perform proper impact analysis and risk assessment prior to deploying defensive measures. 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 I

Indicators of Compromise

• cve — CVE-2025-13162

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