CVE-2026-20323

CVE CVE-2026-20323EUVD EUVD-2026-81139Published 2026-09-16T20:15:35.000ZLast changed 2026-09-17T11:39:21.000ZCVSS 8.3

What the advisory describes

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.

Source: EUVD (ENISA), in the words of the advisory.

Products the advisory names

These come from the advisory itself, not from any check we performed.

• Cisco — Cisco Secure Firewall Management Center (FMC) 7.2.10; 7.2.5.1; 7.2.6; 7.4.2.4; 7.2.8; 7.2.4.1; 7.2.9; 7.2.11; 7.6.1; 7.7.12; 7.0.0; 7.2.3; 7.0.5; 7.7.10.1; 7.0.2; 7.0.8.1; 7.2.2; 7.6.0; 7.7.0; 7.2.10.1; 7.6.2; 7.0.10; 7.2.8.1; 7.2.5.2; 7.0.2.1; 7.2.7; 7.4.7; 7.0.7; 10.0.1; 7.4.2.2; 7.0.6.2; 7.4.3; 7.4.2.1; 7.0.0.1; 7.6.2.1; 7.0.8; 7.2.0.1; 7.2.5; 7.4.1.1; 7.0.1; 7.2.10.2; 7.0.1.1; 7.0.6; 7.3.0; 7.2.4; 7.3.1.1; 7.7.11; 7.2.1; 7.2.0; 7.2.3.1; 7.0.6.1; 7.4.1; 7.0.9; 7.4.0; 7.6.4; 7.4.6; 7.4.2.3; 7.7.10; 7.0.6.3; 7.4.2; 7.0.4; 7.0.3; 7.4.5; 7.6.3; 10.0.0; 7.6.5; 7.4.4; 7.3.1.2; 7.3.1
• Cisco — Cisco Secure Firewall Threat Defense (FTD) Software 7.2.11; 7.2.3; 7.4.4; 7.2.1; 7.4.2.2; 7.3.1; 7.0.4; 7.0.0.1; 7.4.2.4; 7.6.4; 7.0.1.1; 7.2.9; 10.0.0; 7.2.8; 7.2.5.1; 7.4.1; 7.0.8.1; 7.4.2; 7.0.2.1; 7.2.10; 7.0.2; 7.2.5.2; 7.2.4; 7.0.7; 7.0.0; 7.0.6.3; 7.4.2.1; 7.7.10.1; 7.4.3; 7.0.9; 7.7.0; 7.3.0; 7.0.1; 7.2.7; 7.4.1.1; 7.2.0; 7.2.10.2; 7.3.1.2; 7.0.5; 7.4.7; 7.6.2.1; 7.4.0; 7.2.4.1; 7.2.6; 7.2.5; 7.2.2; 7.2.0.1; 7.0.8; 7.0.10; 7.2.8.1; 7.0.6.2; 7.7.10; 7.0.3; 7.0.6; 7.4.2.3; 7.7.11; 7.3.1.1; 7.6.2; 7.6.0; 7.0.6.1; 7.6.1

The versions shown are the advisory's own. Patchlage compares no version numbers and derives no judgement from them — which version is installed is something a person has to look up.

Carried in the product catalogue

An estate covering these products can be recorded in Patchlage. An advisory about them appears in the next morning's situation report.

• Cisco — Secure Firewall Management Center (FMC)
• Cisco — Secure Firewall Threat Defense (FTD) Software

Patchlage reports hits and suspected hits. About everything else this system says nothing — neither this page nor the situation report ever claims that an estate is safe.