CVE-2026-20024
MediumCVSS 6.8Exploitation Probability (EPSS)
Low risk8th percentile - higher than 8% of all known CVEs
Summary
A vulnerability in the OSPF protocol of Cisco Secure Firewall ASA and FTD software allows an authenticated, adjacent attacker to cause an unexpected device reload, resulting in a DoS condition. The issue is due to heap corruption when parsing OSPF packets.
Risk Assessment
An attacker with the OSPF secret key can remotely crash the device, disrupting firewall operations and potentially the entire network.
Recommendation
Apply Cisco-provided patches immediately and restrict OSPF trusted neighbors to only necessary devices.
Original NVD description (English source)
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.