Critical

CI Fortify – Advice for isolating vital systems

All CISA Advisories

July 28, 2026 at 12:00 PM

Overview

CISA, in collaboration with the Australian Signals Directorate’s ACSC and the FBI, has released guidance titled 'CI Fortify' aimed at helping critical infrastructure organizations protect their vital operational technology. This guidance comes in response to increasing cyber threats and provides practical steps for organizations to isolate essential systems from other networks during a disruption or crisis. It emphasizes the importance of identifying critical systems, mapping their connections, and establishing effective separation points. By implementing these recommendations, organizations can strengthen their resilience and ensure continued operation during cyber incidents or geopolitical tensions. This is particularly relevant for sectors that support public safety and essential services.

Key Takeaways

Action Required: Organizations should follow the guidance to identify critical systems, map connections, and implement separation points.
Timeline: Newly disclosed

Original Article Summary

CI Fortify – Advice for isolating vital systems CISA and the Australian Signals Directorate’s Australian Cyber Security Centre (ASD’s ACSC), in collaboration with the Federal Bureau of Investigation and international partners, released joint guidance CI Fortify – Advice for isolating vital systems. This guidance contains practical steps for critical infrastructure (CI) organizations to isolate vital operational technology and enabling systems from all other networks in the event of disruption or crisis and operate in isolation for an extended period. Developed to address escalating cyber threats, the guidance outlines key steps for identifying critical systems, mapping connections, and implementing effective separation points. By following these recommendations, organizations can enhance their resilience, minimize disruption, and maintain essential services during cyber incidents or geopolitical crises.

Impact

Not specified

Exploitation Status

No active exploitation has been reported at this time. However, organizations should still apply patches promptly as proof-of-concept code may exist.

Timeline

Newly disclosed

Remediation

Organizations should follow the guidance to identify critical systems, map connections, and implement separation points.

Additional Information

This threat intelligence is aggregated from trusted cybersecurity sources. For the most up-to-date information, technical details, and official vendor guidance, please refer to the original article linked below.

Related Topics: This incident relates to Critical.

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