A vulnerability in the OSPF protocol of Cisco Secure Firewall ASA Software and Cisco Secure FTD Software could allow an authenticated, adjacent attacker to cause an affected device to reload unexpectedly, resulting in a DoS condition. To exploit this vulnerability, the attacker must have the OSPF secret key. This vulnerability is due to heap corruption in OSPF when parsing packets. An attacker could exploit this vulnerability by sending crafted packets to the OSPF service. A successful exploit could allow the attacker to corrupt the heap, causing the affected device to reload, resulting in a DoS condition.

A vulnerability in the OSPF protocol of Cisco Secure Firewall ASA Software and Cisco Secure FTD Software could allow an authenticated, adjacent attacker to cause an affected device to reload unexpectedly, resulting in a DoS condition. To exploit this vulnerability, the attacker must have the OSPF secret key. This vulnerability is due to heap corruption in OSPF when parsing packets. An attacker could exploit this vulnerability by sending crafted packets to the OSPF service. A successful exploit could allow the attacker to corrupt the heap, causing the affected device to reload, resulting in a DoS condition.

This plugin only works with Tenable.ot.
Please visit https://www.tenable.com/products/tenable-ot for more information.

According to its self-reported version, Cisco ASA Software is affected by multiple vulnerabilities.

Please see the included Cisco BIDs and Cisco Security Advisory for more information.

According to its self-reported version, Cisco Secure Firewall Threat Defense (FTD) Software is affected by multiple vulnerabilities.

Please see the included Cisco BIDs and Cisco Security Advisory for more information.

ID	Name	Product	Family	Type	Severity
506152	Cisco ASA Improper Restriction of Operations within the Bounds of a Memory Buffer (CVE-2026-20024)	Tenable OT Security	Tenable.ot	Remote	medium
311450	Cisco Adaptive Security Appliance (ASA) Software OSPF DoS Vulnerabilities (cisco-sa-asaftd-ospf-ZH8PhbSW)	Nessus	CISCO	Local	medium
311444	Cisco Firepower Threat Defense (FTD) Software OSPF DoS Vulnerabilities (cisco-sa-asaftd-ospf-ZH8PhbSW)	Nessus	CISCO	Combined	medium

Detections

Analytics

CVE-2026-20024

medium

Tenable Plugins

medium

medium

medium