A flaw in Cisco NetFlow Generation Appliance tracked as CVE-2017-3826, could be exploited by an unauthenticated, remote attacker to cause a DoS condition. The vulnerability resides in the hardwares Stream Control Transmission Protocol (SCTP) used by the appliance. Cisco has released a security patch for its devices and confirmed that there are no workarounds to fix the issue. The security patch is not available for the model NGA 3140 because it was dismissed in January 2014.”]
Source: http://securityaffairs.co/wordpress/56825/security/cisco-netflow-generation-appliance-flaw.html