CVE-2026-20022
A vulnerability in the OSPF protocol of Cisco Secure Firewall ASA Software and Cisco Secure FTD Software could allow an unauthenticated, adjacent attacker to cause an…
Published Mar 4, 2026 · updated Aug 11, 2026 · cisco adaptive security appliance software
A vulnerability in the OSPF protocol of Cisco Secure Firewall ASA Software and Cisco Secure FTD Software could allow an unauthenticated, adjacent attacker to cause an affected device to reload unexpectedly, resulting in a DoS condition when OSPF canonicalization debug is enabled by using the command debug ip ospf canon. This vulnerability is due to insufficient input validation when processing OSPF LSU packets. An attacker could exploit this vulnerability by sending crafted unauthenticated OSPF packets. A successful exploit could allow the attacker to write to memory outside of the packet data, causing the device to reload, resulting in a DoS condition.
Code
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No public source repository is identified for this product.
Timeline
Detection, updates, and resolution for this record.
Mar 4, 2026 · NIST NVD
Detected
A vulnerability in the OSPF protocol of Cisco Secure Firewall ASA Software and Cisco Secure FTD Software could allow an unauthenticated, adjacent attacker to cause an affected device to reload unexpectedly, resulting in a DoS condition when OSPF canonicalization debug is enabled by using the command debug ip ospf canon. This vulnerability is due to insufficient input validation when processing OSP
Aug 11, 2026 · NIST NVD
Updated
A vulnerability in the OSPF protocol of Cisco Secure Firewall ASA Software and Cisco Secure FTD Software could allow an unauthenticated, adjacent attacker to cause an affected device to reload unexpectedly, resulting in a DoS condition when OSPF canonicalization debug is enabled by using the command debug ip ospf canon. This vulnerability is due to insufficient input validation when processing OSP
Affected
- cpe cisco/adaptive security appliance software9.12.1
- cpe cisco/adaptive security appliance software9.12.1.2
- cpe cisco/adaptive security appliance software9.12.1.3
- cpe cisco/adaptive security appliance software9.12.2
- cpe cisco/adaptive security appliance software9.12.2.1
- cpe cisco/adaptive security appliance software9.12.2.4
- cpe cisco/adaptive security appliance software9.12.2.5
- cpe cisco/adaptive security appliance software9.12.2.9
- cpe cisco/secure firewall threat defense6.4.0
Sources
- CVE.orgVulnerability recordCVE-2026-20022
Official CVE identifier
cve.org - NIST NVDVulnerability recordCVE-2026-20022
A vulnerability in the OSPF protocol of Cisco Secure Firewall ASA Software and Cisco Secure FTD Software could allow an unauthenticated, adjacent attacker to cause an affected device to reload unexpectedly, resulting in a DoS condition when OSPF canonicalization debug is enabled
nvd.nist.gov