Cisco Firepower Threat Defense and Cisco Adaptive Security Appliances Software are both products of Cisco, Inc. Cisco Adaptive Security Appliances Software is a firewall and network security platform. The platform provides highly secure access to data and network resources, among other features.Cisco Adaptive Security Appliance and Firepower Threat Defense contain an information disclosure vulnerability that could be exploited by a remote, unauthenticated attacker to decrypt, read, modify and re-encrypt information transmitted through the affected IPsec IKEv2 VPN tunnel transmissions.