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CVE-2026-20023

A vulnerability in the OSPF protocol of Cisco Secure Firewall Adaptive Security Appliance (ASA) Software and Cisco Secure Firewall Threat Defense (FTD) Software could allow an unauthenticated, adjacent attacker to corrupt memory on an affected device, resulting in a denial of service (DoS) condition. This vulnerability is due to memory corruption when parsing OSPF protocol packets. An attacker could exploit this vulnerability by sending crafted OSPF packets to an affected device. A successful
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:b9abc458d13c1b0c871df50fc896da0e1af08f1e00afe7b71792b68b55db4372
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

affected · 2 assertions

{"product":"Cisco Secure Firewall Adaptive Security Appliance (ASA) Software","vendor":"Cisco","versions":[{"status":"affected","version":"9.12.1"},{"status":"affected","version":"9.12.1.2"},{"status":"affected","version":"9.12.1.3"},{"status":"affected","version":"9.12.2"},{"status":"affected","version":"9.12.2.4"},{"status":"affected","version":"9.12.2.5"},{"status":"affected","version":"9.12.2.9"},{"status":"affected","version":"9.12.3"},{"status":"affected","version":"9.12.3.2"},{"status":"affected","version":"9.12.3.7"},{"status":"affected","version":"9.12.4"},{"status":"affected","versio…

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:fbf6a478d1a703e276560ae544a4f92d76f5cd98c1415ee0c4cc115dd3c599c0 · sha256:b6b4e074fa3e08d7… · /containers/cna/affected/0

{"product":"Cisco Secure Firewall Threat Defense (FTD) Software","vendor":"Cisco","versions":[{"status":"affected","version":"6.4.0"},{"status":"affected","version":"6.4.0.1"},{"status":"affected","version":"6.4.0.3"},{"status":"affected","version":"6.4.0.2"},{"status":"affected","version":"6.4.0.4"},{"status":"affected","version":"6.4.0.5"},{"status":"affected","version":"6.4.0.6"},{"status":"affected","version":"6.4.0.7"},{"status":"affected","version":"6.4.0.8"},{"status":"affected","version":"6.4.0.9"},{"status":"affected","version":"6.4.0.10"},{"status":"affected","version":"6.4.0.11"},{"…

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:fbf6a478d1a703e276560ae544a4f92d76f5cd98c1415ee0c4cc115dd3c599c0 · sha256:b6b4e074fa3e08d7… · /containers/cna/affected/1

Affected products and versions

2 source assertions
{"product":"Cisco Secure Firewall Adaptive Security Appliance (ASA) Software","vendor":"Cisco","versions":[{"status":"affected","version":"9.12.1"},{"status":"affected","version":"9.12.1.2"},{"status":"affected","version":"9.12.1.3"},{"status":"affected","version":"9.12.2"},{"status":"affected","version":"9.12.2.4"},{"status":"affected","version":"9.12.2.5"},{"status":"affected","version":"9.12.2.9"},{"status":"affected","version":"9.12.3"},{"status":"affected","version":"9.12.3.2"},{"status":"affected","version":"9.12.3.7"},{"status":"affected","version":"9.12.4"},{"status":"affected","versio…
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:fbf6a478d1a703e276560ae544a4f92d76f5cd98c1415ee0c4cc115dd3c599c0 · sha256:b6b4e074fa3e08d7… · /containers/cna/affected/0
{"product":"Cisco Secure Firewall Threat Defense (FTD) Software","vendor":"Cisco","versions":[{"status":"affected","version":"6.4.0"},{"status":"affected","version":"6.4.0.1"},{"status":"affected","version":"6.4.0.3"},{"status":"affected","version":"6.4.0.2"},{"status":"affected","version":"6.4.0.4"},{"status":"affected","version":"6.4.0.5"},{"status":"affected","version":"6.4.0.6"},{"status":"affected","version":"6.4.0.7"},{"status":"affected","version":"6.4.0.8"},{"status":"affected","version":"6.4.0.9"},{"status":"affected","version":"6.4.0.10"},{"status":"affected","version":"6.4.0.11"},{"…
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:fbf6a478d1a703e276560ae544a4f92d76f5cd98c1415ee0c4cc115dd3c599c0 · sha256:b6b4e074fa3e08d7… · /containers/cna/affected/1

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"HIGH","attackVector":"ADJACENT_NETWORK","availabilityImpact":"HIGH","baseScore":6.1,"baseSeverity":"MEDIUM","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"CHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:H","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:fbf6a478d1a703e276560ae544a4f92d76f5cd98c1415ee0c4cc115dd3c599c0 · sha256:b6b4e074fa3e08d7… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

1 source assertion
{"cweId":"CWE-787","description":"Out-of-bounds Write","lang":"en","type":"cwe"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:fbf6a478d1a703e276560ae544a4f92d76f5cd98c1415ee0c4cc115dd3c599c0 · sha256:b6b4e074fa3e08d7… · /containers/cna/problemTypes/0/descriptions/0

Source references

1 source assertion
{"name":"cisco-sa-asaftd-ospf-ZH8PhbSW","url":"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asaftd-ospf-ZH8PhbSW"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:fbf6a478d1a703e276560ae544a4f92d76f5cd98c1415ee0c4cc115dd3c599c0 · sha256:b6b4e074fa3e08d7… · /containers/cna/references/0

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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