{"resultsPerPage":1,"startIndex":0,"totalResults":1,"format":"NVD_CVE","version":"2.0","timestamp":"2026-04-30T07:34:37.403","vulnerabilities":[{"cve":{"id":"CVE-2021-34698","sourceIdentifier":"psirt@cisco.com","published":"2021-10-06T20:15:08.490","lastModified":"2024-11-21T06:10:58.427","vulnStatus":"Modified","cveTags":[],"descriptions":[{"lang":"en","value":"A vulnerability in the proxy service of Cisco AsyncOS for Cisco Web Security Appliance (WSA) could allow an unauthenticated, remote attacker to exhaust system memory and cause a denial of service (DoS) condition on an affected device. This vulnerability is due to improper memory management in the proxy service of an affected device. An attacker could exploit this vulnerability by establishing a large number of HTTPS connections to the affected device. A successful exploit could allow the attacker to cause the system to stop processing new connections, which could result in a DoS condition. Note: Manual intervention may be required to recover from this situation."},{"lang":"es","value":"Una vulnerabilidad en el servicio proxy de Cisco AsyncOS para Cisco Web Security Appliance (WSA) podría permitir a un atacante remoto no autenticado agotar la memoria del sistema y causar una condición de denegación de servicio (DoS) en un dispositivo afectado. Esta vulnerabilidad es debido a una administración inapropiada de la memoria en el servicio proxy de un dispositivo afectado. Un atacante podría explotar esta vulnerabilidad al establecer un gran número de conexiones HTTPS al dispositivo afectado. Una explotación con éxito podría permitir al atacante causar que el sistema deje de procesar nuevas conexiones, lo que podría resultar en una condición de DoS. Nota: Puede ser necesaria una intervención manual para recuperarse de esta situación"}],"metrics":{"cvssMetricV31":[{"source":"psirt@cisco.com","type":"Secondary","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},{"source":"nvd@nist.gov","type":"Primary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","baseScore":7.5,"baseSeverity":"HIGH","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH"},"exploitabilityScore":3.9,"impactScore":3.6}],"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-401"}]},{"source":"nvd@nist.gov","type":"Primary","description":[{"lang":"en","value":"CWE-401"}]}],"configurations":[{"operator":"AND","nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:cisco:asyncos:*:*:*:*:*:*:*:*","versionStartIncluding":"12.0","versionEndExcluding":"12.0.3-005","matchCriteriaId":"706A904F-2F7D-41E2-AA14-4A6F2E089507"},{"vulnerable":true,"criteria":"cpe:2.3:o:cisco:asyncos:*:*:*:*:*:*:*:*","versionStartIncluding":"12.5","versionEndExcluding":"12.5.2-007","matchCriteriaId":"D31D5B5B-F0AC-4F6F-82CC-59F2256C94EB"},{"vulnerable":true,"criteria":"cpe:2.3:o:cisco:asyncos:*:*:*:*:*:*:*:*","versionStartIncluding":"14.0","versionEndExcluding":"14.0.1-014","matchCriteriaId":"DF9EB09B-AF00-487B-9AB3-5ECB2E700260"}]},{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":false,"criteria":"cpe:2.3:h:cisco:web_security_appliance_s170:-:*:*:*:*:*:*:*","matchCriteriaId":"E401F29A-026F-4097-B513-47911CB3AA09"},{"vulnerable":false,"criteria":"cpe:2.3:h:cisco:web_security_appliance_s190:-:*:*:*:*:*:*:*","matchCriteriaId":"AA3B097B-F689-4886-A0C6-B71ECAD783CF"},{"vulnerable":false,"criteria":"cpe:2.3:h:cisco:web_security_appliance_s380:-:*:*:*:*:*:*:*","matchCriteriaId":"23C3AECC-9270-42B5-A36E-208AA0B48D93"},{"vulnerable":false,"criteria":"cpe:2.3:h:cisco:web_security_appliance_s390:-:*:*:*:*:*:*:*","matchCriteriaId":"5290B9CF-CF7D-4762-B5EE-5DAEA03C6409"},{"vulnerable":false,"criteria":"cpe:2.3:h:cisco:web_security_appliance_s680:-:*:*:*:*:*:*:*","matchCriteriaId":"BE85462C-079B-4488-AB0E-989D41EB7AFD"},{"vulnerable":false,"criteria":"cpe:2.3:h:cisco:web_security_appliance_s690:-:*:*:*:*:*:*:*","matchCriteriaId":"48A8E5E8-8361-4BC8-BFA9-CAE4745A9C48"},{"vulnerable":false,"criteria":"cpe:2.3:h:cisco:web_security_appliance_s690x:-:*:*:*:*:*:*:*","matchCriteriaId":"FBEAFE16-BD4F-4538-9A06-173FB678DB8B"}]}]}],"references":[{"url":"https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-wsa-dos-fmHdKswk","source":"psirt@cisco.com","tags":["Vendor Advisory"]},{"url":"https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-wsa-dos-fmHdKswk","source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Vendor Advisory"]}]}}]}