{"resultsPerPage":1,"startIndex":0,"totalResults":1,"format":"NVD_CVE","version":"2.0","timestamp":"2026-09-21T16:50:01.377","vulnerabilities":[{"cve":{"id":"CVE-2021-31376","sourceIdentifier":"sirt@juniper.net","published":"2021-10-19T19:15:10.840","lastModified":"2026-06-17T03:51:40.433","vulnStatus":"Modified","cveTags":[],"descriptions":[{"lang":"en","value":"An Improper Input Validation vulnerability in Packet Forwarding Engine manager (FXPC) process of Juniper Networks Junos OS allows an attacker to cause a Denial of Service (DoS) by sending specific DHCPv6 packets to the device and crashing the FXPC service. Continued receipt and processing of this specific packet will create a sustained Denial of Service (DoS) condition. This issue affects only the following platforms in ACX Series: ACX500, ACX1000, ACX1100, ACX2100, ACX2200, ACX4000, ACX5048, ACX5096 devices. Other ACX platforms are not affected from this issue. This issue affects Juniper Networks Junos OS on ACX500, ACX1000, ACX1100, ACX2100, ACX2200, ACX4000, ACX5048, ACX5096: 18.4 version 18.4R3-S7 and later versions prior to 18.4R3-S8. This issue does not affect: Juniper Networks Junos OS 18.4 versions prior to 18.4R3-S7 on ACX500, ACX1000, ACX1100, ACX2100, ACX2200, ACX4000, ACX5048, ACX5096."},{"lang":"es","value":"Una vulnerabilidad de comprobación de entrada inapropiada en el proceso del Administrador del Motor de Reenvío de Paquetes (FXPC) de Juniper Networks Junos OS permite a un atacante causar una Denegación de Servicio (DoS) mediante el envío de paquetes DHCPv6 específicos al dispositivo y el bloqueo del servicio FXPC. La recepción y el procesamiento continuados de este paquete específico crearán una condición de Denegación de Servicio (DoS) sostenida. Este problema afecta sólo a las siguientes plataformas de la serie ACX: ACX500, ACX1000, ACX1100, ACX2100, ACX2200, ACX4000, ACX5048, ACX5096. Otras plataformas ACX no están afectadas por este problema. Este problema afecta a Juniper Networks Junos OS en ACX500, ACX1000, ACX1100, ACX2100, ACX2200, ACX4000, ACX5048, ACX5096: versión 18.4 18.4R3-S7 y versiones posteriores anteriores a 18.4R3-S8. Este problema no afecta: Juniper Networks Junos OS versiones 18.4 anteriores a 18.4R3-S7 en ACX500, ACX1000, ACX1100, ACX2100, ACX2200, ACX4000, ACX5048, ACX5096"}],"affected":[{"source":"sirt@juniper.net","affectedData":[{"vendor":"Juniper Networks","product":"Junos OS","platforms":["ACX500, ACX1000, ACX1100, ACX2100, ACX2200, ACX4000, ACX5048, ACX5096"],"versions":[{"version":"18.4","lessThan":"18.4R3-S7","versionType":"custom","status":"unaffected","changes":[{"at":"18.4R3-S7","status":"affected"},{"at":"18.4R3-S8","status":"unaffected"}]}]}]}],"metrics":{"cvssMetricV31":[{"source":"sirt@juniper.net","type":"Secondary","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:P","baseScore":5.0,"accessVector":"NETWORK","accessComplexity":"LOW","authentication":"NONE","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"PARTIAL"},"baseSeverity":"MEDIUM","exploitabilityScore":10.0,"impactScore":2.9,"acInsufInfo":false,"obtainAllPrivilege":false,"obtainUserPrivilege":false,"obtainOtherPrivilege":false,"userInteractionRequired":false}]},"weaknesses":[{"source":"sirt@juniper.net","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:juniper:junos:18.4:r3-s7:*:*:*:*:*:*","matchCriteriaId":"14FC491D-8DA8-4E79-A9A6-3629E41C847A"}]},{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":false,"criteria":"cpe:2.3:h:juniper:acx1000:-:*:*:*:*:*:*:*","matchCriteriaId":"AF19CB03-4A42-48BC-A6E1-A6F56D40F422"},{"vulnerable":false,"criteria":"cpe:2.3:h:juniper:acx1100:-:*:*:*:*:*:*:*","matchCriteriaId":"648CB4A2-05FA-4445-BB4F-F9285A8E8A5D"},{"vulnerable":false,"criteria":"cpe:2.3:h:juniper:acx2100:-:*:*:*:*:*:*:*","matchCriteriaId":"E9F5683A-7DCC-4691-AD3A-F2B66684DA9C"},{"vulnerable":false,"criteria":"cpe:2.3:h:juniper:acx2200:-:*:*:*:*:*:*:*","matchCriteriaId":"154658D0-FE3E-43C1-8A4D-CAF67C9BCD98"},{"vulnerable":false,"criteria":"cpe:2.3:h:juniper:acx4000:-:*:*:*:*:*:*:*","matchCriteriaId":"76E2CDA9-2379-482C-B509-D527AFE2C7D5"},{"vulnerable":false,"criteria":"cpe:2.3:h:juniper:acx500:-:*:*:*:*:*:*:*","matchCriteriaId":"36729286-5080-47E8-A961-976BF64F5A93"},{"vulnerable":false,"criteria":"cpe:2.3:h:juniper:acx5048:-:*:*:*:*:*:*:*","matchCriteriaId":"3F8DB691-C9F4-4084-8563-642A2F63DA86"},{"vulnerable":false,"criteria":"cpe:2.3:h:juniper:acx5096:-:*:*:*:*:*:*:*","matchCriteriaId":"44B58F51-4F0D-40BD-A90F-226A26F4646E"}]}]}],"references":[{"url":"https://kb.juniper.net/JSA11241","source":"sirt@juniper.net","tags":["Vendor Advisory"]},{"url":"https://kb.juniper.net/JSA11241","source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Vendor Advisory"]}]}}]}