Nowadays software designed networks, especially SD-WAN (software defined wide-area network) becomes “solution of choice” in new deployments for traditional and cloud branch office and data-center connectivity infrastructure. The SD-WAN can replace firewalls and other perimeter security tools which makes them attractive targets for attackers. Vendors promises “on-the-fly agility, security”, many other benefits. But what the “security” really mean from hand-on perspective? Traditional network appliances are well-researched while SD-WAN is a “black box” from security perspective. Complexity of SDN creates additional security issues and cybersecurity pro should address it before an attack occurs. This presentation will introduce SD-WAN design internals, major components, data and control flow. We will discuss typical vulnerabilities, possible attacks on SD-WAN-based Enterprise Networks.