Automation Studio Insufficient Server Certificate Validation
ABB became aware of vulnerability in the product versions listed as affected in the advisory. An update is available that resolves a vulnerability. Successful exploitation of this vulnerability may enable an attacker to masquerade as a trusted party when B&R Automation Studio establishes a connection with a server via the ANSL over TLS or OPC-UA protocol.
describes (1)
Related CVEs.
| ID | severity | exploitable | ||
|---|---|---|---|---|
| CVE-2025-11043US | — | — | ||
An Improper Certificate Validation vulnerability in the OPC-UA client and ANSL over TLS client used in Automation Studio versions before 6.5 could allow an unauthenticated attacker… | ||||
references
External citations — patches, advisories, analysis.
remediations (2)
- MitigationAutomation Studio
To exploit this vulnerability, an attacker would need to intercept and redirect the communication between B&R Automation Studio and the target server, as well as present manipulated certificates that pass validation checks. B&R recommends operating B&R Automation Studio within Level 2 of the ABB ICS Cyber Security Reference Architecture when connecting to Level 1 devices via ANSL over TLS or OPC-UA. Operating in this trusted environment reduces the risk of successful exploitation drastically. Refer to section “General security recommendations” for further advise on how to keep your system secure.
- FixedAutomation Studio
The problem is corrected in the following product versions: B&R Automation Studio version 6.5 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 de-scribed in the user manual.
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