Critical Intelligence Alert: ED 26-01 - Action Required
On October 15, 2025, the U.S. Cybersecurity and Infrastructure Security Agency (CISA) issued Emergency Directive ED 26-01, ordering federal agencies to mitigate a significant security breach involving F5 BIG-IP products. F5 disclosed that nation-state threat actors maintained long-term unauthorized access to internal systems, exfiltrating: This breach represents a major risk to organizations running F5 devices, especially those with exposed management interfaces or unpatched systems.