ABB T-MAC Plus

Summary

ABB has released an update for its T-MAC Plus system addressing four critical vulnerabilities. These flaws, including file disclosure, authorization bypass, cross-site scripting, and an insecure network protocol, could allow attackers to exfiltrate sensitive data, perform administrative operations, or cause denial-of-service conditions. The affected version is T-MAC Plus 4.0-24, with version 4.0-25 providing the fix.

Full text

ICS Advisory ABB T-MAC Plus Release DateJuly 14, 2026 Alert CodeICSA-26-195-03 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. An update is available that resolves the reported vulnerabilities. An attacker who successfully exploited any of these vulnerabilities could potentially compromise the system in different ways. The following versions of ABB T-MAC Plus are affected: T-MAC Plus 4.0-24 (CVE-2025-14771, CVE-2025-14772, CVE-2025-14773, CVE-2025-14774) CVSS Vendor Equipment Vulnerabilities v3 9.9 ABB ABB T-MAC Plus Files or Directories Accessible to External Parties, Authorization Bypass Through User-Controlled Key, Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting'), Incorrect Authorization Background Critical Infrastructure Sectors: Critical Manufacturing Countries/Areas Deployed: Worldwide Company Headquarters Location: Switzerland Vulnerabilities Expand All + CVE-2025-14771 File Disclosure in ABB T-MAC Plus web application allows authenticated users to exfiltrate files containing sensitive information via crafted HTTP GET request. View CVE Details Affected Products ABB T-MAC Plus Vendor:ABB Product Version:ABB T-MAC Plus 4.0-24 Product Status:known_affected Remediations Vendor fixABB has investigated these vulnerabilities to provide adequate protection to customers. The problem is corrected in the following product versions: T-MAC Plus version 4.0-25 ABB recommends that customers apply the update at earliest convenience. MitigationThe misconfigurations on the IIS server, which were reported to security auditing, have been corrected. File Browsing Feature was enabled on that IIS server. That feature along with the default IIS site has been removed. WorkaroundWorkarounds are specific measures that a user can take to help block an attack, for example, temporarily disabling the vulnerable feature may remove the exposure with well-known impact on functionality. ABB has tested the following workarounds. Although these workarounds will not correct the underlying vulnerability, they can help block known attack vectors. When a workaround reduces functionality, this is identified below as “Impact of workaround”. Relevant CWE: CWE-552 Files or Directories Accessible to External Parties Metrics CVSS Version Base Score Base Severity Vector String 3.1 9.9 CRITICAL CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H CVE-2025-14772 Broken access controls in ABB T-MAC Plus web application allows unprivileged users to performs administrative operations View CVE Details Affected Products ABB T-MAC Plus Vendor:ABB Product Version:ABB T-MAC Plus 4.0-24 Product Status:known_affected Remediations Vendor fixABB has investigated these vulnerabilities to provide adequate protection to customers. The problem is corrected in the following product versions: T-MAC Plus version 4.0-25 ABB recommends that customers apply the update at earliest convenience. MitigationABB T-MAC Plus web application supports several classes of users (e.g., Admin, Customer, Operator, etc.) with different roles. An authenticated user with low privileges (e.g., Customer) can execute administrative operations. The privileges associated to the different users have been revised and applied correctly. WorkaroundWorkarounds are specific measures that a user can take to help block an attack, for example, temporarily disabling the vulnerable feature may remove the exposure with well-known impact on functionality. ABB has tested the following workarounds. Although these workarounds will not correct the underlying vulnerability, they can help block known attack vectors. When a workaround reduces functionality, this is identified below as “Impact of workaround”. Relevant CWE: CWE-639 Authorization Bypass Through User-Controlled Key Metrics CVSS Version Base Score Base Severity Vector String 3.1 8.8 HIGH CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H CVE-2025-14773 Stored Cross-Site Scripting (XSS) in ABB T-MAC Plus web application allows authenticated users to execute arbitrary HTML or JavaScript code on victims browser. View CVE Details Affected Products ABB T-MAC Plus Vendor:ABB Product Version:ABB T-MAC Plus 4.0-24 Product Status:known_affected Remediations Vendor fixABB has investigated these vulnerabilities to provide adequate protection to customers. The problem is corrected in the following product versions: T-MAC Plus version 4.0-25 ABB recommends that customers apply the update at earliest convenience. MitigationA DOM-based XSS vulnerability is present. If a malicious actor gains access to the operations network and can create or edit an existing entity, they could insert malicious JavaScript code to be executed in the web forms. New T-MAC Plus version 4.0-25 will correct the vulnerability. WorkaroundWorkarounds are specific measures that a user can take to help block an attack, for example, temporarily disabling the vulnerable feature may remove the exposure with well-known impact on functionality. ABB has tested the following workarounds. Although these workarounds will not correct the underlying vulnerability, they can help block known attack vectors. When a workaround reduces functionality, this is identified below as “Impact of workaround”. 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 8 HIGH CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H CVE-2025-14774 Insecure network protocol in ABB T-MAC Plus allows unauthenticated attackers to perform a denial-of-service (DoS) of the Card Reader service. View CVE Details Affected Products ABB T-MAC Plus Vendor:ABB Product Version:ABB T-MAC Plus 4.0-24 Product Status:known_affected Remediations Vendor fixABB has investigated these vulnerabilities to provide adequate protection to customers. The problem is corrected in the following product versions: T-MAC Plus version 4.0-25 ABB recommends that customers apply the update at earliest convenience. MitigationIf a malicious actor gains physical access to a serial device, disables it, connects a malicious device with same IP address, and sends a specially crafted message, the service responsible for communicating with the device will be blocked until a manual restart is performed. New T-MAC Plus version 4.0-25 will correct the vulnerability. WorkaroundWorkarounds are specific measures that a user can take to help block an attack, for example, temporarily disabling the vulnerable feature may remove the exposure with well-known impact on functionality. ABB has tested the following workarounds. Although these workarounds will not correct the underlying vulnerability, they can help block known attack vectors. When a workaround reduces functionality, this is identified below as “Impact of workaround”. Relevant CWE: CWE-863 Incorrect Authorization Metrics CVSS Version Base Score Base Severity Vector String 3.1 7.4 HIGH CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H Acknowledgments Angelo Catalani of the Italian National Cybersecurity Agency (ACN) responsibly disclosed the vulnerabilities and provided valuable input on product improvements. 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 possibili

Indicators of Compromise

• cve — CVE-2025-14771
• cve — CVE-2025-14772
• cve — CVE-2025-14773
• cve — CVE-2025-14774

Entities