{"resultsPerPage":1,"startIndex":0,"totalResults":1,"format":"NVD_CVE","version":"2.0","timestamp":"2026-05-14T07:00:35.213","vulnerabilities":[{"cve":{"id":"CVE-2020-3221","sourceIdentifier":"psirt@cisco.com","published":"2020-06-03T18:15:20.103","lastModified":"2024-11-21T05:30:35.537","vulnStatus":"Modified","cveTags":[],"descriptions":[{"lang":"en","value":"A vulnerability in the Flexible NetFlow Version 9 packet processor of Cisco IOS XE Software for Cisco Catalyst 9800 Series Wireless Controllers could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. The vulnerability is due to improper validation of parameters in a Flexible NetFlow Version 9 record. An attacker could exploit this vulnerability by sending a malformed Flexible NetFlow Version 9 packet to the Control and Provisioning of Wireless Access Points (CAPWAP) data port of an affected device. An exploit could allow the attacker to trigger an infinite loop, resulting in a process crash that would cause a reload of the device."},{"lang":"es","value":"Una vulnerabilidad en el procesador de paquetes Flexible NetFlow Versión 9 de Cisco IOS XE Software para los controladores inalámbricos Cisco Catalyst serie 9800, podría permitir a un atacante remoto no autenticado causar una condición de denegación de servicio (DoS) sobre un dispositivo afectado. La vulnerabilidad es debido a una comprobación inapropiada de los parámetros en un registro de Flexible NetFlow Version 9. Un atacante podría explotar esta vulnerabilidad mediante el envío de un paquete de Flexible NetFlow Version 9 malformado hacia el puerto Control and Provisioning of Wireless Access Points (CAPWAP) de un dispositivo afectado. Una explotación podría permitir al atacante activar un bucle infinito, resultando en un bloqueo del proceso que causaría una recarga del dispositivo."}],"metrics":{"cvssMetricV31":[{"source":"nvd@nist.gov","type":"Primary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H","baseScore":8.6,"baseSeverity":"HIGH","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"CHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH"},"exploitabilityScore":3.9,"impactScore":4.0}],"cvssMetricV30":[{"source":"psirt@cisco.com","type":"Secondary","cvssData":{"version":"3.0","vectorString":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H","baseScore":8.6,"baseSeverity":"HIGH","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"CHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH"},"exploitabilityScore":3.9,"impactScore":4.0}],"cvssMetricV2":[{"source":"nvd@nist.gov","type":"Primary","cvssData":{"version":"2.0","vectorString":"AV:N/AC:L/Au:N/C:N/I:N/A:C","baseScore":7.8,"accessVector":"NETWORK","accessComplexity":"LOW","authentication":"NONE","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"COMPLETE"},"baseSeverity":"HIGH","exploitabilityScore":10.0,"impactScore":6.9,"acInsufInfo":false,"obtainAllPrivilege":false,"obtainUserPrivilege":false,"obtainOtherPrivilege":false,"userInteractionRequired":false}]},"weaknesses":[{"source":"psirt@cisco.com","type":"Secondary","description":[{"lang":"en","value":"CWE-20"}]},{"source":"nvd@nist.gov","type":"Primary","description":[{"lang":"en","value":"CWE-20"}]}],"configurations":[{"operator":"AND","nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:cisco:ios_xe:16.10.1:*:*:*:*:*:*:*","matchCriteriaId":"DB6BD18B-B9BD-452F-986E-16A6668E46B6"},{"vulnerable":true,"criteria":"cpe:2.3:o:cisco:ios_xe:16.10.1a:*:*:*:*:*:*:*","matchCriteriaId":"D136D2BC-FFB5-4912-A3B1-BD96148CB9A5"},{"vulnerable":true,"criteria":"cpe:2.3:o:cisco:ios_xe:16.10.1b:*:*:*:*:*:*:*","matchCriteriaId":"A22256FE-431C-4AD9-9E7F-7EAC2D81B1B7"},{"vulnerable":true,"criteria":"cpe:2.3:o:cisco:ios_xe:16.10.1e:*:*:*:*:*:*:*","matchCriteriaId":"ADED0D82-2A4D-4235-BFAC-5EE2D862B652"},{"vulnerable":true,"criteria":"cpe:2.3:o:cisco:ios_xe:16.10.1s:*:*:*:*:*:*:*","matchCriteriaId":"763664F5-E6CD-4936-B2F8-C5E2D5EA7BB6"},{"vulnerable":true,"criteria":"cpe:2.3:o:cisco:ios_xe:16.10.2:*:*:*:*:*:*:*","matchCriteriaId":"0A443E93-6C4B-4F86-BA7C-7C2A929E795A"},{"vulnerable":true,"criteria":"cpe:2.3:o:cisco:ios_xe:16.11.1:*:*:*:*:*:*:*","matchCriteriaId":"E91F8704-6DAD-474A-84EA-04E4AF7BB9B1"},{"vulnerable":true,"criteria":"cpe:2.3:o:cisco:ios_xe:16.11.1a:*:*:*:*:*:*:*","matchCriteriaId":"314C7763-A64D-4023-9F3F-9A821AE4151F"},{"vulnerable":true,"criteria":"cpe:2.3:o:cisco:ios_xe:16.11.1b:*:*:*:*:*:*:*","matchCriteriaId":"5820D71D-FC93-45AA-BC58-A26A1A39C936"},{"vulnerable":true,"criteria":"cpe:2.3:o:cisco:ios_xe:16.11.1c:*:*:*:*:*:*:*","matchCriteriaId":"FC1C85DD-69CC-4AA8-B219-651D57FC3506"},{"vulnerable":true,"criteria":"cpe:2.3:o:cisco:ios_xe:16.11.1s:*:*:*:*:*:*:*","matchCriteriaId":"DB26AE0F-85D8-4EAB-B9BD-457DD81FF0FE"},{"vulnerable":true,"criteria":"cpe:2.3:o:cisco:ios_xe:16.12.1:*:*:*:*:*:*:*","matchCriteriaId":"C98DED36-D4B5-48D6-964E-EEEE97936700"},{"vulnerable":true,"criteria":"cpe:2.3:o:cisco:ios_xe:16.12.1a:*:*:*:*:*:*:*","matchCriteriaId":"CD98C9E8-3EA6-4160-970D-37C389576516"},{"vulnerable":true,"criteria":"cpe:2.3:o:cisco:ios_xe:16.12.1c:*:*:*:*:*:*:*","matchCriteriaId":"C8BEFEDA-B01A-480B-B03D-7ED5D08E4B67"},{"vulnerable":true,"criteria":"cpe:2.3:o:cisco:ios_xe:16.12.1s:*:*:*:*:*:*:*","matchCriteriaId":"9027A528-2588-4C06-810B-5BB313FE4323"},{"vulnerable":true,"criteria":"cpe:2.3:o:cisco:ios_xe:16.12.1t:*:*:*:*:*:*:*","matchCriteriaId":"7745ED34-D59D-49CC-B174-96BCA03B3374"}]},{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":false,"criteria":"cpe:2.3:h:cisco:catalyst_9800-40:-:*:*:*:*:*:*:*","matchCriteriaId":"1B9ED0E5-CB20-4106-9CF2-8EB587B33543"},{"vulnerable":false,"criteria":"cpe:2.3:h:cisco:catalyst_9800-80:-:*:*:*:*:*:*:*","matchCriteriaId":"2B0E620C-8E09-4F7C-A326-26013173B993"},{"vulnerable":false,"criteria":"cpe:2.3:h:cisco:catalyst_9800-cl:-:*:*:*:*:*:*:*","matchCriteriaId":"FF93F1C8-669F-4ECB-8D81-ECDA7B550175"},{"vulnerable":false,"criteria":"cpe:2.3:h:cisco:catalyst_9800-l:-:*:*:*:*:*:*:*","matchCriteriaId":"2E0BA345-B7D7-4975-9199-4DC7875BBFD0"},{"vulnerable":false,"criteria":"cpe:2.3:h:cisco:catalyst_9800-l-c:-:*:*:*:*:*:*:*","matchCriteriaId":"4E9EA95F-4E39-4D9C-8A84-D1F6014A4A40"},{"vulnerable":false,"criteria":"cpe:2.3:h:cisco:catalyst_9800-l-f:-:*:*:*:*:*:*:*","matchCriteriaId":"EA0BC769-C244-41BD-BE80-E67F4E1CDDA4"}]}]}],"references":[{"url":"https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iosxe-fnfv9-dos-HND6Fc9u","source":"psirt@cisco.com","tags":["Patch","Vendor 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