Description
A vulnerability in the Open Shortest Path First (OSPF) implementation of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, adjacent attacker to cause a reload of an affected device, resulting in a denial of service (DoS) condition. The vulnerability exists because the affected software improperly parses certain options in OSPF link-state advertisement (LSA) type 11 packets. An attacker could exploit this vulnerability by sending a crafted LSA type 11 OSPF packet to an affected device. A successful exploit could allow the attacker to cause a reload of the affected device, resulting in a DoS condition for client traffic that is traversing the device.
Affected products
cisco: adaptive security appliance; cisco: adaptive security appliance software; cisco: asa 5505; cisco: asa 5510; cisco: asa 5512-x; cisco: asa 5515-x; cisco: asa 5520; cisco: asa 5525-x; cisco: asa 5550; cisco: asa 5555-x; cisco: asa 5580; cisco: asa 5585-x; cisco: secure firewall threat defense
References2
- tools.cisco.com/security/center/content/CiscoSecurityAdvisory/c… Vendor Advisory
- tools.cisco.com/security/center/content/CiscoSecurityAdvisory/c… Vendor Advisory
Metrics
- CVSS 3.1
-
7.4
HIGH
Score source: NVD
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H - EPSS — exploit probability
- 1% percentile: 44 · as of 10 November 2026
- CWE
- CWE-20
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