CVE-2026-20222

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.

CVSS v3 7.4 HIGH

7.4^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.8 / Impact : 4.0

Attack Vector ADJACENT_NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope CHANGED

References

Link	Resource
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asaftd-eigrp-dos-GOhNejSj

Configurations

No configuration.

History

16 Sep 2026, 21:17

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-09-16 21:17

Updated : 2026-09-17 15:16

NVD link : CVE-2026-20222

Mitre link : CVE-2026-20222

CVE.ORG link : CVE-2026-20222

JSON object : View

Products Affected

No product.

CWE

CWE-401

Missing Release of Memory after Effective Lifetime

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"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"}], "defaultStatus": "unknown"}, {"vendor": "Cisco", "product": "Cisco Secure Firewall Threat Defense (FTD) Software", "versions": [{"status": "affected", "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"}], "defaultStatus": "unknown"}]}], "published": "2026-09-16T21:17:07.910", "references": [{"url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asaftd-eigrp-dos-GOhNejSj", "source": "psirt@cisco.com"}], "vulnStatus": "Received", "weaknesses": [{"type": "Secondary", "source": "psirt@cisco.com", "description": [{"lang": "en", "value": "CWE-401"}]}], "descriptions": [{"lang": "en", "value": "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.\r\n\r\nThis 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."}], "lastModified": "2026-09-17T15:16:41.290", "sourceIdentifier": "psirt@cisco.com"}