# CISA Issues Guidance on Isolating Critical Systems Amid Cyber Threats

*Published July 29, 2026*
*Source: [https://www.bleepingcomputer.com/news/security/cisa-shares-advice-on-isolating-vital-systems-during-cyberattacks/](https://www.bleepingcomputer.com/news/security/cisa-shares-advice-on-isolating-vital-systems-during-cyberattacks/)*

## Executive Summary

CISA and its Australian counterpart have released guidance urging critical infrastructure operators to be ready to isolate operational technology systems during cyber incidents. This measure is intended to limit the impact of attacks and maintain operational continuity.

## Article

The Cybersecurity and Infrastructure Security Agency (CISA), along with its Australian counterpart, has issued new guidelines aimed at safeguarding critical infrastructure during cyber incidents. This joint advisory highlights the importance of being prepared to isolate operational technology (OT) systems quickly to mitigate the impact of cyberattacks. By focusing on isolation strategies, the guidance seeks to protect vital infrastructure from being compromised.

The advisory comes at a time when threats to critical infrastructure are increasingly sophisticated and disruptive. CISA emphasizes that organizations should not only focus on detecting and responding to threats but also on implementing measures to isolate critical systems effectively. This approach can prevent attackers from moving laterally within a network, thereby reducing potential damage.

Organizations are encouraged to develop and test incident response plans that include specific procedures for isolating OT environments. This preparation can be crucial in maintaining operational continuity and protecting sensitive data during an attack. CISA also stresses the importance of regular training and simulations for staff to ensure readiness in the event of a real threat.

The guidance serves as a reminder of the evolving nature of cyber threats and the need for robust defense mechanisms. By adopting these recommended practices, critical infrastructure operators can enhance their resilience and safeguard essential services from malicious activities.

For security teams, this advisory underscores the vital role of proactive planning and readiness in the face of persistent cyber threats. It is a call to action for organizations to bolster their defenses and ensure that they can respond swiftly and effectively when under attack.