The majority of the bugs in Cisco s Firepower Threat Defense (FTD) and Adaptive Security Appliance (ASA) software can enable denial of service (DoS) on affected devices. The most severe of these flaws includes a vulnerability in Cisco Firepower Chassis Manager (FCM), which exists in the Firepower Extensible Operating System (FXOS) and provides management capabilities. The flaw (CVE-2020-3456) ranks 8.8 out of 10 on the CVSS scale and stems from insufficient CSRF protections in the FCM interface.
Source: https://threatpost.com/cisco-dos-flaws-network-security-software/160414/