Threats Tagged 'cve-2026-20323'

A vulnerability in the sftunnel inter-device communication protocol of Cisco Secure FMC and FTD Software allows an unauthenticated adjacent attacker to impersonate a peer device and gain manager-level (root equivalent) access. This occurs due to improper TLS certificate management on the sftunnel management connection. Exploitation requires the sftunnel connection to be down or disrupted to allow the attacker to connect with a crafted TLS certificate and register as a peer with root access.

A vulnerability in the sftunnel inter-device communication protocol of Cisco Secure FMC Software and Cisco Secure FTD Software could allow an unauthenticated, adjacent attacker to impersonate the peer device and obtain access at the level of the manager role, which is equivalent to root. This vulnerability is due to improper management of the TLS certificate for the sftunnel management connection. An attacker could exploit this vulnerability by connecting to the sftunnel port using a crafted TLS certificate. A successful exploit could allow the attacker to become a registered sftunnel peer with root access. Note: The attack is successful only if the sftunnel connection is down or the attack can disrupt the sftunnel connection long enough to execute the attack.