Today, Cisco released security updates to address ArcaneDoor—exploitation of Cisco Adaptive Security Appliances (ASA) devices and Cisco Firepower Threat Defense (FTD) software. A cyber threat actor could exploit vulnerabilities (, , ) to take control of an affected system. 

Cisco has reported active exploitation of CVE 2024-20353 and CVE-2024-20359 and CISA has added these vulnerabilities to its . 

CISA strongly encourages users and administrators to apply the necessary updates, hunt for any malicious activity, report positive findings to CISA, and review the following articles for more information: