ABB B&R Automation Runtime

View CSAF
Summary
ABB became aware of vulnerability in the product versions listed as affected in the advisory. An update is available that resolves a vulnerability. An attacker who successfully exploited this vulnerability could cause the product to stop.
The following versions of ABB B&R Automation Runtime are affected:

Automation Runtime <6.5, >=6.5, =R4.93 (CVE-2025-11044, CVE-2025-11044)





CVSS
Vendor
Equipment
Vulnerabilities




v3 6.8
ABB
ABB B&R Automation Runtime
Allocation of Resources Without Limits or Throttling




Background

Critical Infrastructure Sectors: Critical Manufacturing
Countries/Areas Deployed: Worldwide
Company Headquarters Location: Switzerland


Vulnerabilities

Expand All +

CVE-2025-11044

An Allocation of Resources Without Limits or Throttling vulnerability in the ANSL-Server component of B&R Automation Runtime versions prior to 6.5 and prior to R4.93 could be exploited by an unauthenticated attacker on the net-work to win a race condition, resulting in permanent denial-of-service (DoS) conditions on affected devices.
View CVE Details

Affected Products
ABB B&R Automation Runtime

Vendor:ABB
Product Version:ABB Automation Runtime <6.5, ABB Automation Runtime <R4.93 Product Status:fixed, known_affected


Remediations
Vendor fixThe problem is corrected in the following product versions: - Automation Runtime 6 versions >= 6.5 - Automation Runtime 4 versions >= R4.93 B&R recommends that customers apply the update at earliest convenience. The process to install updates is described in the user manual. The step to identify the installed product version is described in the user manual.
MitigationThe vulnerability cannot be exploited on all devices or across all customer applications. Extensive investigations by B&R have determined that shorter cycle times in customer projects increase the likelihood of potential exploitation. For customers unable to transition to a patched version, adjusting their application configuration to longer cycle times may therefore be considered as a mitigating measure. B&R Automation Runtime is designed to be operated on Level 1 of the ABB ICS Cyber Security Reference Architecture. Exploitation of the vulnerability from outside Level 1 would require an attacker to bypass the Control Network Firewall. Limiting the maximum data traffic and the maximum number of concurrent connections to the ANSL server of Automation Runtime on the Control Network Firewall, shall be considered to mitigate this vulnerability. B&R further recommends, in alignment with its Defense in Depth for B&R Products guidelines, that customers: - Test the maximum load capacity of their application under Automation Runtime before commissioning. - Restrict the permitted data traffic to the device via the Control Network Firewall to no more than 80% of the measured peak traffic value. Refer to section ?General security recommendations? for further advise on how to keep your system secure.

Relevant CWE: CWE-770 Allocation of Resources Without Limits or Throttling

Metrics




CVSS Version
Base Score
Base Severity
Vector String




3.1
6.8
MEDIUM
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:H/RL:O/RC:C








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 B&R. B&R 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 B&R or any of its suppliers be liable for direct, indirect, special, incidental or conse-quential 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 B&R 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 B&R, 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 causes the vulnerability? - The vulnerability is caused by insufficient throttling and limiting mechanism in the ANSL Server used the B&R Automation Runtime. What might an attacker use the vulnerability to do? - An attacker who successfully exploited this vulnerability could cause the affected system node to stop. How could an attacker exploit the vulnerability? - An attacker could try to exploit the vulnerability by creating a specially crafted message and sending the message to an affected system node. This would require that the attacker has access to the system network, by connecting to the net-work either directly or through a wrongly configured or penetrated firewall, or that he installs malicious software on a system node or otherwise infects the network with malicious software. Recommended practices help mitigate such attacks, see section Mitigating Factors above. Could the vulnerability be exploited remotely? - Yes, an attacker who has network access to an affected system node could exploit this vulnerability. Recommended practices include that process control systems are physically protected, have no direct connections to the Internet, and are separated from other networks by means of a firewall system that has a minimal number of ports exposed. What does the update do? - The update removes the vulnerability by limiting incoming network traffic that is handled by the ANSL server component. When this security advisory was issued, had this vulnerability been publicly disclosed? - No, B&R discovered this vulnerability as a part of its own security analysis. When this security advisory was issued, had B&R received any reports that this vulnerability was being exploited? - No, B&R 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 Improving Industrial Control Systems Cybersecurity with Defense-in-Depth Strategies.
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.
Organizations observing suspected malicious activity should follow established internal procedures and report findings to CISA for tracking and correlation against other incidents.

Advisory Conversion Disclaimer
This ICSA is a verbatim republication of ABB PSIRT SA25P005 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 ABB PSIRT directly for any questions regarding this advisory.
Revision History

Initial Release Date: 2026-01-19




Date
Revision
Summary




2026-01-19
1
Initial version.


2026-05-05
2
Initial CISA Republication of ABB PSIRT SA25P005 advisory




Legal Notice and Terms of Use

https://www.cisa.gov/news-events/ics-advisories/icsa-26-125-03

2026-05-05 12:00 UTC
--- FMail-lnx 2.3.2.6-B20251227
* Origin: TCOB1 A Mail Only System (2:263/1)

ABB B&R Automation Runtime

View CSAF
Summary
An update is available that resolves a vulnerability identified by B&Rs internal security analysis in the product versions listed as affected in this advisory. An attacker who successfully exploited these vulnerabilities could take over a remote session or execute code in the context of the user?s browser session.
The following versions of ABB B&R Automation Runtime are affected:

Automation Runtime <6.4, 6.4 (CVE-2025-3449, CVE-2025-3448, CVE-2025-11498)





CVSS
Vendor
Equipment
Vulnerabilities




v3 6.1
B&R
ABB B&R Automation Runtime
Generation of Predictable Numbers or Identifiers, Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting'), Improper Neutralization of Formula Elements in a CSV File




Background

Critical Infrastructure Sectors: Energy
Countries/Areas Deployed: Worldwide
Company Headquarters Location: Switzerland


Vulnerabilities

Expand All +

CVE-2025-3449

A Generation of Predictable Numbers or Identifiers vulnerability in the SDM component of B&R Automation Runtime versions before 6.4 may allow an unauthenticated network-based attacker to take over already established sessions.
View CVE Details

Affected Products
ABB B&R Automation Runtime

Vendor:B&R
Product Version:Automation Runtime <6.4
Product Status:fixed, known_affected


Remediations
Vendor fixThe problem is corrected in Automation Runtime 6.4. The System Diagnostic Manager (SDM) is disabled by default in Automation Runtime 6 and is not intended be enabled on active systems located outside properly secured production networks or in facilities lacking adequate physical and logical access controls to prevent any form of unauthorized interaction. For customers who use SDM on their systems, B&R recommends applying the update based on risk assessment at the earliest convenience. The process to install updates is described in the user manual. The step to identify the installed product version is described in the user manual.

Relevant CWE: CWE-340 Generation of Predictable Numbers or Identifiers

Metrics




CVSS Version
Base Score
Base Severity
Vector String




3.1
4.2
MEDIUM
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N/E:F/RL:O/RC:C







CVE-2025-3448

Reflected cross-site scripting (XSS) vulnerabilities exist in System Diagnostics Manager (SDM) of B&R Automation Runtime versions before 6.4 that enables a remote attacker to execute arbitrary JavaScript code in the context of the attacked user?s browser session
View CVE Details

Affected Products
ABB B&R Automation Runtime

Vendor:B&R
Product Version:Automation Runtime <6.4
Product Status:fixed, known_affected


Remediations
Vendor fixThe problem is corrected in Automation Runtime 6.4. The System Diagnostic Manager (SDM) is disabled by default in Automation Runtime 6 and is not intended be enabled on active systems located outside properly secured production networks or in facilities lacking adequate physical and logical access controls to prevent any form of unauthorized interaction. For customers who use SDM on their systems, B&R recommends applying the update based on risk assessment at the earliest convenience. The process to install updates is described in the user manual. The step to identify the installed product version is described in the user manual.

Relevant CWE: CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Metrics




CVSS Version
Base Score
Base Severity
Vector String




3.1
6.1
MEDIUM
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N/E:F/RC:C







CVE-2025-11498

An Improper Neutralization of Formula Elements in a CSV File vulnerability exists in System Diagnostics Manager (SDM) of B&R Automation Runtime versions before 6.4 enabling a remote attacker to inject formula data into a generated CSV file. The exploitation of this vulnerability requires the attack-er to create a malicious link. The user would need to click on this link, after which the resulting CSV file additionally needs to be manually opened.
View CVE Details

Affected Products
ABB B&R Automation Runtime

Vendor:B&R
Product Version:Automation Runtime <6.4
Product Status:fixed, known_affected


Remediations
Vendor fixThe problem is corrected in Automation Runtime 6.4. The System Diagnostic Manager (SDM) is disabled by default in Automation Runtime 6 and is not intended be enabled on active systems located outside properly secured production networks or in facilities lacking adequate physical and logical access controls to prevent any form of unauthorized interaction. For customers who use SDM on their systems, B&R recommends applying the update based on risk assessment at the earliest convenience. The process to install updates is described in the user manual. The step to identify the installed product version is described in the user manual.

Relevant CWE: CWE-1236 Improper Neutralization of Formula Elements in a CSV File

Metrics




CVSS Version
Base Score
Base Severity
Vector String




3.1
6.1
MEDIUM
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N/RL:O/RC:C








Acknowledgments

ABB PSIRT reported these vulnerabilities to CISA.


Notice
The information in this document is subject to change without notice, and should not be construed as a commitment by B&R. B&R 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 B&R 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 B&R 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 B&R, 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.

Mitigating factors
Do not enable the System Diagnostics Manager when it is not required. Refer to section ?General security recommendations? for further advise on how to keep your system secure.

Workarounds
Do not use Hyperlinks provided by untrusted 3rd party to access the SDM. Hyperlinks may be provided via: ? Emails from unknown users ? Social media channels ? Messaging services ? Webpages with comment functionality ? QR Codes The use of external Web Application Firewalls (WAF) can mitigate attacks using reflected cross-site scripting.

Frequently asked questions
What causes the vulnerabilities? The vulnerabilities are caused by insufficient input sanitization and generation of predictable numbers. What is System Diagnostics Manager (SDM)? System Diagnostics Manager (SDM) is a webpage available over the Automation Runtime Webserver, showing key diagnostic information of the running controller. What is Automation Runtime (AR)? B&R Automation Runtime is a middleware system enabling customers to run applications on B&R target systems. What might an attacker use the vulnerabilities to do? An attacker who successfully exploited these vulnerabilities could cause to run arbitrary code in the context of the user?s browser session or take over the user?s session. Since the SDM currently does not process any session-specific data and also does not implement authentication mechanisms at the session level, B&R is not aware of any advantages an attacker could gain by taking over the session ID How could an attacker exploit the vulnerabilities? To exploit the XSS vulnerability CVE-2025-3448, an attacker could try to create a hyperlink including malicious script code. This hyperlink must be opened by the user to launch the attack. To exploit vulnerability CVE-2025-3449, an attacker would need to guess a user's session ID. Could the vulnerabilities be exploited remotely? Yes, an attacker who has network access to an affected system node could exploit this vulnerability. Recommended practices include that process control systems are physically protected, have no direct connections to the Internet, and are separated from other networks by means of a firewall system that has a minimal number of ports exposed. When this security advisory was issued, had this vulnerability been publicly disclosed? No, B&R discovered the vulnerabilities through its own security analysis. When this security advisory was issued, had B&R received any reports that this vulnerability was being exploited? No, B&R 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 this vulnerability.
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 Improving Industrial Control Systems Cybersecurity with Defense-in-Depth Strategies.
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.
Organizations observing suspected malicious activity should follow established internal procedures and report findings to CISA for tracking and correlation against other incidents.

Advisory Conversion Disclaimer
This ICSA is a verbatim republication of ABB PSIRT SA25P003 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 ABB PSIRT directly for any questions regarding this advisory.
Revision History

Initial Release Date: 2025-10-07




Date
Revision
Summary




2025-10-07
1
Initial version.


2025-10-14
2
Added information about CVE-2025-11498


2026-05-21
3
Initial CISA Republication of ABB PSIRT SA25P003 advisory




Legal Notice and Terms of Use

https://www.cisa.gov/news-events/ics-advisories/icsa-26-141-04

2026-05-21 12:00 UTC
--- FMail-lnx 2.3.2.6-B20251227
* Origin: TCOB1 A Mail Only System (2:263/1)