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CVE-2026-20222

Cisco Secure Firewall Adaptive Security Appliance (ASA) Software · denial of service

CVSS 3.1 7.4 HIGHCheck source for fixed versionsKEV status unknown

Original advisory

cve-program · CVE-2026-20222

Published

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.

Read the publisher's advisory

Affected versions, risk and source history

cve-program · CVE-2026-20222

Published

Cisco Secure Firewall Adaptive Security Appliance (ASA) Software

Vendor product

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "vendor": "Cisco",
                    "product": "Cisco Secure Firewall Adaptive Security Appliance (ASA) Software",
                    "versions": [
                        {
                            "version": "9.19.1",
                            "status": "affected"
                        },
                        {
                            "version": "9.19.1.5",
                            "status": "affected"
                        },
                        {
                            "version": "9.19.1.9",
                            "status": "affected"
                        },
                        {
                            "version": "9.19.1.12",
                            "status": "affected"
                        },
                        {
                            "version": "9.19.1.18",
                            "status": "affected"
                        },
                        {
                            "version": "9.20.1",
                            "status": "affected"
                        },
                        {
                            "version": "9.19.1.22",
                            "status": "affected"
                        },
                        {
                            "version": "9.20.1.5",
                            "status": "affected"
                        },
                        {
                            "version": "9.19.1.24",
                            "status": "affected"
                        },
                        {
                            "version": "9.20.2",
                            "status": "affected"
                        },
                        {
                            "version": "9.19.1.27",
                            "status": "affected"
                        },
                        {
                            "version": "9.20.2.10",
                            "status": "affected"
                        },
                        {
                            "version": "9.19.1.28",
                            "status": "affected"
                        },
                        {
                            "version": "9.20.2.21",
                            "status": "affected"
                        },
                        {
                            "version": "9.19.1.31",
                            "status": "affected"
                        },
                        {
                            "version": "9.20.2.22",
                            "status": "affected"
                        },
                        {
                            "version": "9.20.3",
                            "status": "affected"
                        },
                        {
                            "version": "9.23.1",
                            "status": "affected"
                        },
                        {
                            "version": "9.22.1.1",
                            "status": "affected"
                        },
                        {
                            "version": "9.20.3.4",
                            "status": "affected"
                        },
                        {
                            "version": "9.20.3.7",
                            "status": "affected"
                        },
                        {
                            "version": "9.19.1.37",
                            "status": "affected"
                        },
                        {
                            "version": "9.20.3.9",
                            "status": "affected"
                        },
                        {
                            "version": "9.19.1.38",
                            "status": "affected"
                        },
                        {
                            "version": "9.22.1.3",
                            "status": "affected"
                        },
                        {
                            "version": "9.20.3.10",
                            "status": "affected"
                        },
                        {
                            "version": "9.22.1.2",
                            "status": "affected"
                        },
                        {
                            "version": "9.20.3.13",
                            "status": "affected"
                        },
                        {
                            "version": "9.22.1.6",
                            "status": "affected"
                        },
                        {
                            "version": "9.22.2",
                            "status": "affected"
                        },
                        {
                            "version": "9.20.3.16",
                            "status": "affected"
                        },
                        {
                            "version": "9.19.1.42",
                            "status": "affected"
                        },
                        {
                            "version": "9.23.1.3",
                            "status": "affected"
                        },
                        {
                            "version": "9.20.3.20",
                            "status": "affected"
                        },
                        {
                            "version": "9.22.2.4",
                            "status": "affected"
                        },
                        {
                            "version": "9.23.1.7",
                            "status": "affected"
                        },
                        {
                            "version": "9.20.4",
                            "status": "affected"
                        },
                        {
                            "version": "9.22.2.9",
                            "status": "affected"
                        },
                        {
                            "version": "9.23.1.13",
                            "status": "affected"
                        },
                        {
                            "version": "9.20.4.7",
                            "status": "affected"
                        },
                        {
                            "version": "9.22.2.13",
                            "status": "affected"
                        },
                        {
                            "version": "9.20.4.10",
                            "status": "affected"
                        },
                        {
                            "version": "9.23.1.19",
                            "status": "affected"
                        },
                        {
                            "version": "9.22.2.14",
                            "status": "affected"
                        },
                        {
                            "version": "9.24.1",
                            "status": "affected"
                        },
                        {
                            "version": "9.23.1.22",
                            "status": "affected"
                        },
                        {
                            "version": "9.20.4.14",
                            "status": "affected"
                        },
                        {
                            "version": "9.22.2.20",
                            "status": "affected"
                        },
                        {
                            "version": "9.20.4.19",
                            "status": "affected"
                        },
                        {
                            "version": "9.23.1.26",
                            "status": "affected"
                        },
                        {
                            "version": "9.22.2.32",
                            "status": "affected"
                        },
                        {
                            "version": "9.22.3",
                            "status": "affected"
                        },
                        {
                            "version": "9.24.1.5",
                            "status": "affected"
                        },
                        {
                            "version": "9.20.4.22",
                            "status": "affected"
                        },
                        {
                            "version": "9.24.1.9",
                            "status": "affected"
                        },
                        {
                            "version": "9.20.4.28",
                            "status": "affected"
                        },
                        {
                            "version": "9.22.3.5",
                            "status": "affected"
                        },
                        {
                            "version": "9.23.1.195",
                            "status": "affected"
                        },
                        {
                            "version": "9.20.4.30",
                            "status": "affected"
                        },
                        {
                            "version": "9.24.1.155",
                            "status": "affected"
                        },
                        {
                            "version": "9.23.1.32",
                            "status": "affected"
                        },
                        {
                            "version": "9.24.1.11",
                            "status": "affected"
                        },
                        {
                            "version": "9.20.4.34",
                            "status": "affected"
                        },
                        {
                            "version": "9.20.4.235",
                            "status": "affected"
                        }
                    ],
                    "defaultStatus": "unknown"
                }

Cisco Secure Firewall Threat Defense (FTD) Software

Vendor product

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "vendor": "Cisco",
                    "product": "Cisco Secure Firewall Threat Defense (FTD) Software",
                    "versions": [
                        {
                            "version": "7.3.0",
                            "status": "affected"
                        },
                        {
                            "version": "7.3.1",
                            "status": "affected"
                        },
                        {
                            "version": "7.3.1.1",
                            "status": "affected"
                        },
                        {
                            "version": "7.4.0",
                            "status": "affected"
                        },
                        {
                            "version": "7.4.1",
                            "status": "affected"
                        },
                        {
                            "version": "7.4.1.1",
                            "status": "affected"
                        },
                        {
                            "version": "7.3.1.2",
                            "status": "affected"
                        },
                        {
                            "version": "7.6.0",
                            "status": "affected"
                        },
                        {
                            "version": "7.4.2",
                            "status": "affected"
                        },
                        {
                            "version": "7.4.2.1",
                            "status": "affected"
                        },
                        {
                            "version": "7.7.0",
                            "status": "affected"
                        },
                        {
                            "version": "7.4.2.2",
                            "status": "affected"
                        },
                        {
                            "version": "7.6.1",
                            "status": "affected"
                        },
                        {
                            "version": "7.4.2.3",
                            "status": "affected"
                        },
                        {
                            "version": "7.6.2",
                            "status": "affected"
                        },
                        {
                            "version": "7.7.10",
                            "status": "affected"
                        },
                        {
                            "version": "7.7.11",
                            "status": "affected"
                        },
                        {
                            "version": "7.6.2.1",
                            "status": "affected"
                        },
                        {
                            "version": "7.7.10.1",
                            "status": "affected"
                        },
                        {
                            "version": "7.4.2.4",
                            "status": "affected"
                        },
                        {
                            "version": "7.4.3",
                            "status": "affected"
                        },
                        {
                            "version": "7.6.4",
                            "status": "affected"
                        },
                        {
                            "version": "10.0.0",
                            "status": "affected"
                        },
                        {
                            "version": "7.4.4",
                            "status": "affected"
                        },
                        {
                            "version": "7.4.7",
                            "status": "affected"
                        }
                    ],
                    "defaultStatus": "unknown"
                }

Original source record · Cite this exact observation · Complete original publisher JSON