CVE-2026-20295

CVE CVE-2026-20295EUVD EUVD-2026-81113Published 2026-09-16T20:09:56.000ZLast changed 2026-09-17T13:40:57.000ZCVSS 8.6

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, remote attacker to exhaust the available memory of an affected device. This vulnerability is due to improper management of memory resources during sftunnel TLS connection setup. An attacker could exploit this vulnerability by sending crafted sftunnel TLS frames to an affected device during the connection setup. A successful exploit could allow the attacker to exhaust the available memory on the affected device, which could result in a DoS condition.

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

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.