The Cybersecurity and Infrastructure Security Agency (CISA) is a United States federal agency responsible for protecting critical infrastructure and enhancing national cybersecurity resilience. Although CISA operates within the U.S. Department of Homeland Security, its advisories and threat intelligence are widely referenced by Australian organisations and global enterprises. CISA publishes vulnerability alerts, threat actor reports, and guidance on best practices that support proactive defence strategies. Australian security teams often integrate CISA advisories alongside ACSC guidance to strengthen vulnerability management and incident response capabilities. While CISA is not an Australian regulator, its global influence contributes to international collaboration against cybercrime and nation-state threats. Leveraging CISA intelligence enhances awareness of emerging vulnerabilities that may impact Australian businesses and government entities.