Vulnerability intelligence
CVE-2025-11043
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.
CVSS Score
9.1
Critical
EPSS — Exploit Probability
0.2%
Riskier than 11% of all CVEs
Exploitation
Not in CISA KEV
No federal exploitation record
Remediation
unknown
Check vendor advisories
1 article across 1 outlet · first covered May 5, 2026 · latest May 5, 2026
Coverage timeline
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CVE-2025-11043 Flaw Lets Attackers Spoof ABB B&R Serverswww.cisa.gov · May 5, 2026