{"resultsPerPage":1,"startIndex":0,"totalResults":1,"format":"NVD_CVE","version":"2.0","timestamp":"2026-04-19T01:08:46.303","vulnerabilities":[{"cve":{"id":"CVE-2021-22955","sourceIdentifier":"support@hackerone.com","published":"2021-12-07T14:15:08.890","lastModified":"2024-11-21T05:51:00.833","vulnStatus":"Modified","cveTags":[],"descriptions":[{"lang":"en","value":"A unauthenticated denial of service vulnerability exists in Citrix ADC <13.0-83.27, <12.1-63.22 and 11.1-65.23 when configured as a VPN (Gateway) or AAA virtual server could allow an attacker to cause a temporary disruption of the Management GUI, Nitro API, and RPC communication."},{"lang":"es","value":"Se presenta una vulnerabilidad de denegación de servicio no autenticada en Citrix ADC versiones anteriores a 13.0-83.27, versiones anteriores a 12.1-63.22 y 11.1-65.23 que, cuando es configurado como servidor virtual VPN (Gateway) o AAA, podría permitir a un atacante causar una interrupción temporal de la GUI de administración, la API Nitro y la comunicación RPC"}],"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: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:M/Au:N/C:N/I:N/A:P","baseScore":4.3,"accessVector":"NETWORK","accessComplexity":"MEDIUM","authentication":"NONE","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"PARTIAL"},"baseSeverity":"MEDIUM","exploitabilityScore":8.6,"impactScore":2.9,"acInsufInfo":false,"obtainAllPrivilege":false,"obtainUserPrivilege":false,"obtainOtherPrivilege":false,"userInteractionRequired":false}]},"weaknesses":[{"source":"support@hackerone.com","type":"Secondary","description":[{"lang":"en","value":"CWE-400"}]},{"source":"nvd@nist.gov","type":"Primary","description":[{"lang":"en","value":"CWE-400"}]}],"configurations":[{"operator":"AND","nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:citrix:application_delivery_controller_firmware:*:*:*:*:*:*:*:*","versionEndIncluding":"11.1-65.23","matchCriteriaId":"609476CC-EB28-4FC2-8035-1C8A0F6F5573"},{"vulnerable":true,"criteria":"cpe:2.3:o:citrix:application_delivery_controller_firmware:*:*:*:*:*:*:*:*","versionStartIncluding":"12.1","versionEndExcluding":"12.1-63.22","matchCriteriaId":"C076C750-AC7C-48DD-86B2-EB69FA14467F"},{"vulnerable":true,"criteria":"cpe:2.3:o:citrix:application_delivery_controller_firmware:*:*:*:*:*:*:*:*","versionStartIncluding":"13.0","versionEndExcluding":"13.0-83.27","matchCriteriaId":"C2F3ACE6-B0F6-4E27-9DD8-EFEC98A7ACB4"}]},{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":false,"criteria":"cpe:2.3:h:citrix:application_delivery_controller:-:*:*:*:*:*:*:*","matchCriteriaId":"80E69E10-6F40-4FE4-9D84-F6C25EAB79D8"}]}]},{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:citrix:gateway:*:*:*:*:*:*:*:*","versionEndExcluding":"11.1-65.23","matchCriteriaId":"7C7C2760-C923-4D70-B9BA-9905CBD7A72C"},{"vulnerable":true,"criteria":"cpe:2.3:a:citrix:gateway:*:*:*:*:*:*:*:*","versionStartIncluding":"12.1","versionEndExcluding":"12.1-63.22","matchCriteriaId":"FEC9E148-82D8-4032-9E30-3A40362FEF29"},{"vulnerable":true,"criteria":"cpe:2.3:a:citrix:gateway:*:*:*:*:*:*:*:*","versionStartIncluding":"13.0","versionEndExcluding":"13.0-83.27","matchCriteriaId":"0FA42F00-61CF-44DB-9C16-C3EDD3960548"}]}]}],"references":[{"url":"https://support.citrix.com/article/CTX330728","source":"support@hackerone.com","tags":["Vendor Advisory"]},{"url":"https://support.citrix.com/article/CTX330728","source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Vendor Advisory"]}]}}]}