CVE-2026-20022
published 2026-03-04CVE-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…
PriorityP432medium6.5CVSS 3.1
AVAACLPRNUINSUCNINAH
EPSS
0.19%
9.3th percentile
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.
Affected
479 ranges· showing 25
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| cisco | adaptive_security_appliance_software | — | — |
| cisco | adaptive_security_appliance_software | — | — |
| cisco | adaptive_security_appliance_software | — | — |
| cisco | adaptive_security_appliance_software | — | — |
| cisco | adaptive_security_appliance_software | — | — |
| cisco | adaptive_security_appliance_software | — | — |
| cisco | adaptive_security_appliance_software | — | — |
| cisco | adaptive_security_appliance_software | — | — |
| cisco | adaptive_security_appliance_software | — | — |
| cisco | adaptive_security_appliance_software | — | — |
| cisco | adaptive_security_appliance_software | — | — |
| cisco | adaptive_security_appliance_software | — | — |
| cisco | adaptive_security_appliance_software | — | — |
| cisco | adaptive_security_appliance_software | — | — |
| cisco | adaptive_security_appliance_software | — | — |
| cisco | adaptive_security_appliance_software | — | — |
| cisco | adaptive_security_appliance_software | — | — |
| cisco | adaptive_security_appliance_software | — | — |
| cisco | adaptive_security_appliance_software | — | — |
| cisco | adaptive_security_appliance_software | — | — |
| cisco | adaptive_security_appliance_software | — | — |
| cisco | adaptive_security_appliance_software | — | — |
| cisco | adaptive_security_appliance_software | — | — |
| cisco | adaptive_security_appliance_software | — | — |
| cisco | adaptive_security_appliance_software | — | — |
CVSS provenance
nvdv3.16.5MEDIUMCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
vendor_cisco6.8MEDIUM
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Cisco
Cisco Secure Firewall Adaptive Security Appliance and Secure Firewall Threat Defense Software OSPF Protocol Vulnerabilities
vendor_cisco·2026-03-04·CVSS 6.8
CVE-2026-20020 [MEDIUM] CWE-119 Cisco Secure Firewall Adaptive Security Appliance and Secure Firewall Threat Defense Software OSPF Protocol Vulnerabilities
Cisco Secure Firewall Adaptive Security Appliance and Secure Firewall Threat Defense Software OSPF Protocol Vulnerabilities
Multiple vulnerabilities in the OSPF feature of Cisco Secure Firewall Adaptive Security Appliance (ASA) Software and Cisco Secure Firewall Threat Defense (FTD) Software could allow an adjacent attacker to cause the device to reload unexpectedly, resulting in a denial of service (DoS) condition.
For more information about these vulnerabilities, see the Details section of this advisory.
Cisco has released software updates that address these vulnerabilities. There are no workarounds that address these vulnerabilities.
This advisory is available at the following link:https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asaftd-ospf-ZH8Phb
Cisco
Cisco Secure Firewall Adaptive Security Appliance and Secure Firewall Threat Defense Software OSPF Protocol Vulnerabilities
vendor_cisco·CVSS 3.1
CVE-2026-20022 Cisco Secure Firewall Adaptive Security Appliance and Secure Firewall Threat Defense Software OSPF Protocol Vulnerabilities
CVE-2026-20022: Cisco Secure Firewall Adaptive Security Appliance and Secure Firewall Threat Defense Software OSPF Protocol Vulnerabilities
Multiple vulnerabilities in the OSPF feature of Cisco Secure Firewall Adaptive Security Appliance (ASA) Software and Cisco Secure Firewall Threat Defense (FTD) Software could allow an adjacent attacker to cause the device to reload unexpectedly, resulting in a denial of service (DoS) condition. For more information about these vulnerabilities, see the
CVSS: 3.1
CWE: CWE-119, CWE-190, CWE-20, CWE-119, CWE-190, CWE-20, CWE-401, CWE-787, CWE-823, CWE-119, CWE-190, CWE-20, CWE-119, CWE-190, CWE-20, CWE-401, CWE-787, CWE-823
Bug IDs: CSCwn69075, CSCwn69076, CSCwn69078, CSCwn69075, CSCwn69076
GHSA
GHSA-99cr-qjpc-34g3: A vulnerability in the OSPF protocol of Cisco Secure Firewall ASA Software and Cisco Secure FTD Software could allow an unauthenticated, adjacent atta
ghsa_unreviewed·2026-03-04
CVE-2026-20022 [MEDIUM] CWE-823 GHSA-99cr-qjpc-34g3: A vulnerability in the OSPF protocol of Cisco Secure Firewall ASA Software and Cisco Secure FTD Software could allow an unauthenticated, adjacent atta
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.
No detection rules found.
No public exploits indexed.
No writeups or analysis indexed.
2026-03-04
Published