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IoT/OTSep 23, 2026

Considerations for Critical Infrastructure Operators Working With Third-Party ICS Integrators

US agencies warn critical infrastructure operators about third-party ICS integrator risks.

The FBI and CISA have issued a fact sheet highlighting risks for critical infrastructure entities working with third-party Industrial Control System (ICS) integrators. The agencies emphasize the importance of the principle of least privilege and secure practices to prevent malicious actors from exploiting third-party access. A recent incident involved foreign cyber actors gaining access to a US industrial automation company's network, exfiltrating sensitive SCADA and ICS data.

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The lesson from this incident

Full lesson

Foreign cyber actors exploited trusted third-party access granted to an industrial automation company to infiltrate networks and exfiltrate sensitive SCADA and ICS data. The root failure lies in over-permissioned third-party accounts that lacked proper controls, monitoring, and least-privilege enforcement. This matters because ICS and SCADA systems underpin physical operations in critical infrastructure — a compromise can cascade from data theft to operational disruption or even physical harm. Organizations often extend implicit trust to integrators without validating their security posture, creating a backdoor that bypasses perimeter defenses entirely.

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Indicators of Compromise

Extracted by AI from the linked source. Not reviewed by an editor. How this works

  • malware — .zip

Entities

FBI (vendor)CISA (vendor)ICS (technology)SCADA (technology)