CVE-2019-12700

CVE-2019-12700 is a denial-of-service (DoS) vulnerability affecting Cisco Firepower Threat Defense (FTD), Firepower Management Center (FMC), and FXOS Software. It stems from improper resource management within the Pluggable Authentication Module (PAM) during user session handling. An authenticated remote attacker can exploit this by performing numerous simultaneous successful SSH logins, exhausting system resources and causing a device reload. The vulnerability has a CVSS score of 6.5 (Medium), indicating a network-based attack with low attack complexity and requiring low privileges, leading to high availability impact. There is no known active exploitation, publicly available exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.