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Considerations for Critical Infrastructure Operators Working With Third-Party ICS Integrators
September 23, 2026 · CISA (US-CERT) · Severity: CRITICAL
This fact sheet from the FBI and CISA highlights considerations for critical infrastructure entities when working with third-party industrial control system integrators. It emphasizes applying the principle of least privilege to reduce vulnerabilities and recommends actions to prevent malicious exploitation of third-party accesses. 📌 **Analyst Note:** This guidance is crucial as third-party integrators often have deep access to OT systems, and any compromise could cascade into physical damage. Organizations should audit integrator access regularly and enforce strict segmentation and monitoring.
Key Takeaways
- Critical infrastructure operators must apply the principle of least privilege when granting third-party ICS integrators access to operational technology environments to minimize potential exploitation pathways.
- The FBI and CISA fact sheet emphasizes that failing to adopt secure practices with integrators can expose critical infrastructure to malicious actors seeking disruptive and destructive effects on equipment.
- Owners and operators should work closely with integrators to implement secure frameworks and reduce risks from third-party accesses that could compromise critical infrastructure operational environments.