opc ua security

  1. CVE-2025-11043: ABB Automation Studio Certificate Validation Flaw and OT Trust Risk

    CISA republished ABB’s advisory for CVE-2025-11043 on May 5, 2026, warning that B&R Automation Studio versions before 6.5 improperly validate server certificates in OPC UA and ANSL-over-TLS client connections, enabling a network-positioned attacker to impersonate a trusted server. The bug is not...
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    • industrial patching opc ua security ot cybersecurity tls certificate validation
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    • Forum: Security Alerts