CVE-2026-20222

CVE CVE-2026-20222EUVD EUVD-2026-81125Published 2026-09-16T20:12:18.000ZLast changed 2026-09-18T19:08:55.000ZCVSS 7.4

What the advisory describes

A vulnerability in the EIGRP implementation in Cisco Secure Firewall Adaptive Security Appliance (ASA) Software and Cisco Secure Firewall Threat Defense (FTD) Software could allow an unauthenticated, adjacent attacker to cause the device to reload unexpectedly, resulting in a denial of service (DoS) condition. This vulnerability is due to improper resource management when handling EIGRP update messages. An attacker could exploit this vulnerability by sending crafted EIGRP updates at a high rate to an affected device. A successful exploit could allow the attacker to trigger a memory leak that will eventually cause the affected device to reload unexpectedly.

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 9.24.1.9; 9.22.2.32; 9.20.3.10; 9.22.3.5; 9.20.4.22; 9.20.4.10; 9.23.1.26; 9.24.1.5; 9.22.2.20; 9.23.1; 9.19.1.37; 9.19.1.31; 9.20.3.13; 9.19.1.5; 9.22.3; 9.22.1.3; 9.20.2; 9.22.2.4; 9.20.3.20; 9.23.1.195; 9.19.1.27; 9.22.1.2; 9.22.2; 9.20.3.16; 9.24.1; 9.23.1.32; 9.19.1; 9.23.1.19; 9.24.1.155; 9.20.4.235; 9.20.1; 9.23.1.3; 9.23.1.22; 9.20.3.7; 9.24.1.11; 9.22.2.14; 9.20.4.34; 9.20.4.28; 9.20.3.9; 9.20.4; 9.19.1.12; 9.20.2.21; 9.20.4.7; 9.20.1.5; 9.19.1.28; 9.20.4.14; 9.22.1.1; 9.19.1.38; 9.23.1.13; 9.22.1.6; 9.19.1.42; 9.23.1.7; 9.19.1.9; 9.20.4.30; 9.20.4.19; 9.19.1.22; 9.19.1.18; 9.20.3.4; 9.20.3; 9.22.2.13; 9.20.2.22; 9.22.2.9; 9.19.1.24; 9.20.2.10
Cisco — Cisco Secure Firewall Threat Defense (FTD) Software 7.4.1; 7.4.3; 7.4.4; 7.6.0; 7.7.0; 7.7.10.1; 7.6.4; 7.4.2; 7.3.0; 7.4.1.1; 7.3.1.1; 7.4.0; 7.3.1.2; 7.7.11; 7.4.2.3; 7.4.2.2; 7.4.2.1; 7.4.2.4; 7.6.1; 10.0.0; 7.6.2; 7.3.1; 7.4.7; 7.7.10; 7.6.2.1

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

Does this concern one of your customers?

This page cannot answer that — it does not know your estate. Whoever has recorded their environments gets the answer the morning after publication, together with a paragraph they can forward to the customer unedited.

Try it for 28 days

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.