Immediate Action Required: CISA Issues Emergency Directive to Secure Cisco SD-WAN Systems WASHINGTON — The Cybersecurity and Infrastructure Security Agency (CISA) today issued Emergency Directive (ED) 26-03: Mitigate Vulnerabilities in Cisco SD-WAN Systems and Supplemental Direction ED 26-03: Hunt and Hardening Guidance for Cisco SD-WAN Systems, in response to a significant cyber threat targeting ...