CVE-2026-20025
MEDIUMCVSS Vector
CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H
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2Tags
Description
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 insufficient input validation when processing OSPF link-state update (LSU) packets. An attacker could exploit this vulnerability by sending crafted OSPF LSU packets. A successful exploit could allow the attacker to corrupt the heap, causing the device to reload, resulting in a DoS condition.
Analysis
Denial of service in Cisco Secure Firewall ASA and Secure FTD devices results from improper validation of OSPF link-state update packets, allowing authenticated adjacent attackers with the OSPF secret key to trigger heap corruption and forced device reloads. An attacker can exploit this by crafting malicious OSPF packets to crash affected devices, causing service disruption. …
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Remediation
Within 30 days: Identify affected systems and apply vendor patches as part of regular patch cycle. Monitor vendor channels for patch availability.
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