{"affected":[{"affectedData":[{"product":"Cisco Adaptive Security Appliance Software","vendor":"Cisco","versions":[{"lessThan":"6.4.0.13","status":"affected","version":"unspecified","versionType":"custom"}]},{"product":"Cisco Firepower Threat Defense Software","vendor":"Cisco","versions":[{"lessThan":"6.6.5","status":"affected","version":"unspecified","versionType":"custom"}]}],"source":"psirt@cisco.com"}],"configurations":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:a:cisco:adaptive_security_appliance:*:*:*:*:*:*:*:*","matchCriteriaId":"713E8185-E75D-4470-9C6A-6021DF154897","versionEndIncluding":"9.7","vulnerable":true},{"criteria":"cpe:2.3:a:cisco:secure_firewall_threat_defense:*:*:*:*:*:*:*:*","matchCriteriaId":"0AA89D2A-44F7-4207-BC0F-70BAA3C5AC1C","versionEndIncluding":"6.2.2","vulnerable":true},{"criteria":"cpe:2.3:a:cisco:secure_firewall_threat_defense:*:*:*:*:*:*:*:*","matchCriteriaId":"2FD7C727-F209-46CF-B8BA-5F4A035102FA","versionEndExcluding":"6.4.0.13","versionStartIncluding":"6.2.3","vulnerable":true},{"criteria":"cpe:2.3:a:cisco:secure_firewall_threat_defense:*:*:*:*:*:*:*:*","matchCriteriaId":"6BAB496F-F3FF-4188-B191-64ED999CDF1C","versionEndExcluding":"6.6.5","versionStartIncluding":"6.5.0","vulnerable":true},{"criteria":"cpe:2.3:a:cisco:secure_firewall_threat_defense:*:*:*:*:*:*:*:*","matchCriteriaId":"AEC6CF5C-9A31-41B0-99EA-FB2734E4CFDD","versionEndExcluding":"6.7.0.3","versionStartIncluding":"6.7.0","vulnerable":true},{"criteria":"cpe:2.3:a:cisco:secure_firewall_threat_defense:7.0.0:*:*:*:*:*:*:*","matchCriteriaId":"604568DA-466A-47C0-8229-C7F1A10FCDE9","vulnerable":true},{"criteria":"cpe:2.3:o:cisco:adaptive_security_appliance_software:*:*:*:*:*:*:*:*","matchCriteriaId":"371C8F32-C2BB-49E2-A9AB-BEBCDB6709C1","versionEndExcluding":"9.8.4.40","versionStartIncluding":"9.8","vulnerable":true},{"criteria":"cpe:2.3:o:cisco:adaptive_security_appliance_software:*:*:*:*:*:*:*:*","matchCriteriaId":"9138F19B-2402-4A19-B37E-2EDAE9EFF8EB","versionEndExcluding":"9.12.4.26","versionStartIncluding":"9.9","vulnerable":true},{"criteria":"cpe:2.3:o:cisco:adaptive_security_appliance_software:*:*:*:*:*:*:*:*","matchCriteriaId":"DBA21489-FED1-4FA7-B5DA-41ED129D716B","versionEndExcluding":"9.14.3","versionStartIncluding":"9.13","vulnerable":true},{"criteria":"cpe:2.3:o:cisco:adaptive_security_appliance_software:*:*:*:*:*:*:*:*","matchCriteriaId":"CE55D049-D331-45CF-B4CB-9519DCC48241","versionEndExcluding":"9.15.1.17","versionStartIncluding":"9.15","vulnerable":true},{"criteria":"cpe:2.3:o:cisco:adaptive_security_appliance_software:*:*:*:*:*:*:*:*","matchCriteriaId":"A40C76E7-07C6-4DE4-9B7D-3D9726011AC3","versionEndExcluding":"9.16.1.28","versionStartIncluding":"9.16","vulnerable":true}],"negate":false,"operator":"OR"}]}],"cveTags":[],"descriptions":[{"lang":"en","value":"A vulnerability in the web services interface of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to trigger a denial of service (DoS) condition. This vulnerability is due to improper input validation when parsing HTTPS requests. An attacker could exploit this vulnerability by sending a malicious HTTPS request to an affected device. A successful exploit could allow the attacker to cause the device to reload, resulting in a DoS condition."},{"lang":"es","value":"Una vulnerabilidad en la interfaz de servicios web del software Cisco Adaptive Security Appliance (ASA) y del software Cisco Firepower Threat Defense (FTD) podría permitir a un atacante remoto no autenticado desencadenar una condición de denegación de servicio (DoS). Esta vulnerabilidad es debido a una comprobación inapropiada de entradas cuando son analizadas las peticiones HTTPS. Un atacante podría explotar esta vulnerabilidad mediante el envío de una petición HTTPS maliciosa a un dispositivo afectado. Una explotación con éxito podría permitir al atacante causar que el dispositivo se recargue, resultando en una condición de DoS"}],"id":"CVE-2021-1573","lastModified":"2026-08-11T19:37:30.880","metrics":{"cvssMetricV2":[{"acInsufInfo":false,"baseSeverity":"HIGH","cvssData":{"accessComplexity":"MEDIUM","accessVector":"NETWORK","authentication":"NONE","availabilityImpact":"COMPLETE","baseScore":7.1,"confidentialityImpact":"NONE","integrityImpact":"NONE","vectorString":"AV:N/AC:M/Au:N/C:N/I:N/A:C","version":"2.0"},"exploitabilityScore":8.6,"impactScore":6.9,"obtainAllPrivilege":false,"obtainOtherPrivilege":false,"obtainUserPrivilege":false,"source":"nvd@nist.gov","type":"Primary","userInteractionRequired":false}],"cvssMetricV31":[{"cvssData":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":8.6,"baseSeverity":"HIGH","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"CHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H","version":"3.1"},"exploitabilityScore":3.9,"impactScore":4.0,"source":"psirt@cisco.com","type":"Secondary"},{"cvssData":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":7.5,"baseSeverity":"HIGH","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"exploitabilityScore":3.9,"impactScore":3.6,"source":"nvd@nist.gov","type":"Primary"}],"ssvcV203":[{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","ssvcData":{"id":"CVE-2021-1573","options":[{"exploitation":"none"},{"automatable":"yes"},{"technicalImpact":"partial"}],"role":"CISA Coordinator","timestamp":"2024-11-06T16:01:58.648981Z","version":"2.0.3"}}]},"published":"2022-01-11T19:15:07.743","references":[{"source":"psirt@cisco.com","tags":["Vendor Advisory"],"url":"https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asafdt-webvpn-dos-KSqJAKPA"},{"source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Vendor Advisory"],"url":"https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asafdt-webvpn-dos-KSqJAKPA"}],"sourceIdentifier":"psirt@cisco.com","vulnStatus":"Modified","weaknesses":[{"description":[{"lang":"en","value":"CWE-121"},{"lang":"en","value":"CWE-787"}],"source":"psirt@cisco.com","type":"Secondary"},{"description":[{"lang":"en","value":"CWE-787"}],"source":"nvd@nist.gov","type":"Primary"}]}