Cisco Firepower Threat Defense (FTD) is a suite of unified software from Cisco that provides next-generation firewall services.Cisco Firepower Threat Defense (FTD) Software is vulnerable to an information disclosure vulnerability that stems from its TLS handler’s implementation of improper countermeasures against Bleichenbacher attacks using SSL decryption policy on the device Bleichenbacher attack implemented improper countermeasures, an unauthenticated remote attacker can use the vulnerability to gain access to sensitive information.