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

CVSS 3.1 7.4 HIGHCheck source for fixed versionsKEV status unknown

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.

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Affected versions, risk and source history

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CVE-2026-20222 · CVE overview and exploitation status

cve-program · CVE-2026-20222

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Sources read 13 Nov 04:05 UTC · 274 of 275 readable · 272 fully read · documentation 469/469 current