CVE-2019-12673

CVE-2019-12673 is a denial-of-service (DoS) vulnerability affecting the FTP inspection engine in Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software. This flaw, stemming from insufficient validation of FTP data, allows an unauthenticated, remote attacker to trigger a DoS condition by sending specially crafted malicious FTP traffic through an affected device. Rated with a CVSS score of 7.5 (High), it requires no user interaction or privileges for exploitation, making it a significant threat to device availability. While no public exploit code or active exploitation has been observed, and community discussion is minimal, organizations using affected Cisco products should prioritize patching to mitigate this risk.