CVE-2025-11043 Improper Server Certificate Validation in Automation Studio
An unauthenticated network attacker can intercept and interfere with data exchanges due to improper certificate validation in the OPC-UA and ANSL clients.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2025-11043?
CVE-2025-11043 is a critical vulnerability in B&R Automation Studio, published on 19 Jan 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
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 on the network to position themselves to intercept and interfere with data exchanges.
Weakness: CWE-295
Which versions are affected by CVE-2025-11043?
How do I fix CVE-2025-11043?
No fix has been published for CVE-2025-11043 yet. Limit exposure of the affected software until one is available.
Is CVE-2025-11043 being exploited?
There is no known exploitation of CVE-2025-11043 in the wild and no public exploit code.
Sources
Also known as GHSA-67wp-8rc4-mvrw.