Successful exploitation of these vulnerabilities could allow an attacker to overrule the Automation Builder's user management.
The following versions of Automation Builder are affected:
The affected products store all user management information in the project file. Despite the password data being fully encrypted, an attacker could try to modify parts of the Automation Builder project file by specially crafting contents so the user management will be overruled.
CVE-2025-3394 has been assigned to this vulnerability. A CVSS v3 base score of 7.8 has been calculated; the CVSS vector string is (AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H).
A CVSS v4 score has also been calculated for CVE-2025-3394. A base score of 8.5 has been calculated; the CVSS vector string is (AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N).
Automation Builder projects, including AC500 V2 or SM560-S devices, contain the application files for these devices. An attacker could try to modify parts of these files so the project can be changed by overruling the Automation Builder user management.
CVE-2025-3395 has been assigned to this vulnerability. A CVSS v3 base score of 7.1 has been calculated; the CVSS vector string is (AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N).
A CVSS v4 score has also been calculated for CVE-2025-3395. A base score of 8.4 has been calculated; the CVSS vector string is (AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N).
Jiho Shin from Sungkyunkwan University reported these vulnerabilities to CISA.
ABB recommends users apply the following workarounds:
For CVE-2025-3394:
For CVE-2025-3395:
CISA recommends users take defensive measures to minimize the risk of exploitation of these vulnerabilities, such as:
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/ics. 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/ics 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.
No known public exploitation specifically targeting these vulnerabilities has been reported to CISA at this time. These vulnerabilities are not exploitable remotely.