CVE-2026-20250

CVE CVE-2026-20250EUVD EUVD-2026-81112Published 2026-09-16T20:09:56.000ZLast changed 2026-09-18T19:09:13.000ZCVSS 8.6

What the advisory describes

A vulnerability in Datagram TLS (DTLS) message handling of Cisco Secure Firewall Adaptive Security Appliance (ASA) Software and Cisco Secure Firewall Threat Defense (FTD) Software for Cisco Secure Firewall 3100 Series and 4200 Series devices could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. This vulnerability is due to improper resource management when processing certain DTLS messages. An attacker could exploit this vulnerability by sending a crafted stream of DTLS traffic to an affected device. A successful exploit could allow the attacker to cause the device to reload, resulting 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 Adaptive Security Appliance (ASA) Software 9.22.1.3; 9.22.2.14; 9.22.1.1; 9.23.1.3; 9.24.1; 9.22.2.13; 9.22.2; 9.23.1.7; 9.22.1.6; 9.23.1.22; 9.22.2.4; 9.23.1.13; 9.23.1; 9.23.1.26; 9.23.1.19; 9.22.2.9; 9.22.2.20
Cisco — Cisco Secure Firewall Threat Defense (FTD) Software 7.6.1; 7.7.0; 7.7.10; 10.0.0; 7.6.2.1; 7.6.4; 7.7.11; 7.6.2; 7.7.10.1; 7.6.0

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 Adaptive Security Appliance (ASA) Software
Cisco — Secure Firewall Threat Defense (FTD) Software

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