{"resultsPerPage":1,"startIndex":0,"totalResults":1,"format":"NVD_CVE","version":"2.0","timestamp":"2026-05-12T13:47:49.673","vulnerabilities":[{"cve":{"id":"CVE-2026-21921","sourceIdentifier":"sirt@juniper.net","published":"2026-01-15T21:16:08.400","lastModified":"2026-01-23T18:52:35.070","vulnStatus":"Analyzed","cveTags":[],"descriptions":[{"lang":"en","value":"A Use After Free vulnerability in the chassis daemon (chassisd) of Juniper Networks Junos OS and Junos OS Evolved allows a network-based attacker authenticated with low privileges to cause a Denial-of-Service (DoS).\n\nWhen telemetry collectors are frequently subscribing and unsubscribing to sensors continuously over a long period of time, telemetry-capable processes like chassisd, rpd or mib2d will crash and restart, which - depending on the process - can cause a complete outage until the system has recovered.\n\nThis issue affects:\n\n Junos OS: \n\n\n\n  *  all versions before 22.4R3-S8,\n  *  23.2 versions before 23.2R2-S5,\n  *  23.4 versions before 23.4R2;\n\n\n\n\nJunos OS Evolved:\n\n\n\n  *  all versions before 22.4R3-S8-EVO,\n  *  23.2 versions before 23.2R2-S5-EVO,\n  *  23.4 versions before 23.4R2-EVO."},{"lang":"es","value":"Una vulnerabilidad de Uso Después de Liberar en el demonio de chasis (chassisd) de Juniper Networks Junos OS y Junos OS Evolved permite a un atacante basado en red autenticado con bajos privilegios causar una Denegación de Servicio (DoS).\n\nCuando los recolectores de telemetría se suscriben y anulan la suscripción a sensores frecuentemente y de forma continua durante un largo período de tiempo, los procesos con capacidad de telemetría como chassisd, rpd o mib2d se bloquearán y reiniciarán, lo cual - dependiendo del proceso - puede causar una interrupción completa hasta que el sistema se haya recuperado.\n\nEste problema afecta:\n\nJunos OS:\n\n  *  todas las versiones anteriores a 22.4R3-S8,\n  *  versiones 23.2 anteriores a 23.2R2-S5,\n  *  versiones 23.4 anteriores a 23.4R2;\n\nJunos OS Evolved:\n\n  *  todas las versiones anteriores a 22.4R3-S8-EVO,\n  *  versiones 23.2 anteriores a 23.2R2-S5-EVO,\n  *  versiones 23.4 anteriores a 23.4R2-EVO."}],"metrics":{"cvssMetricV40":[{"source":"sirt@juniper.net","type":"Secondary","cvssData":{"version":"4.0","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:Y/R:A/V:X/RE:M/U:X","baseScore":7.1,"baseSeverity":"HIGH","attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"NONE","privilegesRequired":"LOW","userInteraction":"NONE","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"NONE","vulnAvailabilityImpact":"HIGH","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","subAvailabilityImpact":"LOW","exploitMaturity":"NOT_DEFINED","confidentialityRequirement":"NOT_DEFINED","integrityRequirement":"NOT_DEFINED","availabilityRequirement":"NOT_DEFINED","modifiedAttackVector":"NOT_DEFINED","modifiedAttackComplexity":"NOT_DEFINED","modifiedAttackRequirements":"NOT_DEFINED","modifiedPrivilegesRequired":"NOT_DEFINED","modifiedUserInteraction":"NOT_DEFINED","modifiedVulnConfidentialityImpact":"NOT_DEFINED","modifiedVulnIntegrityImpact":"NOT_DEFINED","modifiedVulnAvailabilityImpact":"NOT_DEFINED","modifiedSubConfidentialityImpact":"NOT_DEFINED","modifiedSubIntegrityImpact":"NOT_DEFINED","modifiedSubAvailabilityImpact":"NOT_DEFINED","Safety":"NOT_DEFINED","Automatable":"YES","Recovery":"AUTOMATIC","valueDensity":"NOT_DEFINED","vulnerabilityResponseEffort":"MODERATE","providerUrgency":"NOT_DEFINED"}}],"cvssMetricV31":[{"source":"sirt@juniper.net","type":"Primary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","baseScore":6.5,"baseSeverity":"MEDIUM","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH"},"exploitabilityScore":2.8,"impactScore":3.6}]},"weaknesses":[{"source":"sirt@juniper.net","type":"Primary","description":[{"lang":"en","value":"CWE-416"}]}],"configurations":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:juniper:junos:*:*:*:*:*:*:*:*","versionEndExcluding":"22.4","matchCriteriaId":"57F66641-003B-49D6-A9B9-AB300CFE3C93"},{"vulnerable":true,"criteria":"cpe:2.3:o:juniper:junos:22.4:-:*:*:*:*:*:*","matchCriteriaId":"1379EF30-AF04-4F98-8328-52A631F24737"},{"vulnerable":true,"criteria":"cpe:2.3:o:juniper:junos:22.4:r1:*:*:*:*:*:*","matchCriteriaId":"28E42A41-7965-456B-B0AF-9D3229CE4D4C"},{"vulnerable":true,"criteria":"cpe:2.3:o:juniper:junos:22.4:r1-s1:*:*:*:*:*:*","matchCriteriaId":"CB1A77D6-D3AD-481B-979C-8F778530B175"},{"vulnerable":true,"criteria":"cpe:2.3:o:juniper:junos:22.4:r1-s2:*:*:*:*:*:*","matchCriteriaId":"3A064B6B-A99B-4D8D-A62D-B00C7870BC30"},{"vulnerable":true,"criteria":"cpe:2.3:o:juniper:junos:22.4:r2:*:*:*:*:*:*","matchCriteriaId":"40813417-A938-4F74-A419-8C5188A35486"},{"vulnerable":true,"criteria":"cpe:2.3:o:juniper:junos:22.4:r2-s1:*:*:*:*:*:*","matchCriteriaId":"7FC1BA1A-DF0E-4B15-86BA-24C60E546732"},{"vulnerable":true,"criteria":"cpe:2.3:o:juniper:junos:22.4:r2-s2:*:*:*:*:*:*","matchCriteriaId":"EBB967BF-3495-476D-839A-9DBFCBE69F91"},{"vulnerable":true,"criteria":"cpe:2.3:o:juniper:junos:22.4:r3:*:*:*:*:*:*","matchCriteriaId":"7E5688D6-DCA4-4550-9CD1-A3D792252129"},{"vulnerable":true,"criteria":"cpe:2.3:o:juniper:junos:22.4:r3-s1:*:*:*:*:*:*","matchCriteriaId":"8494546C-00EA-49B6-B6FA-FDE42CA5B1FA"},{"vulnerable":true,"criteria":"cpe:2.3:o:juniper:junos:22.4:r3-s2:*:*:*:*:*:*","matchCriteriaId":"8BB98579-FA33-4E41-A162-A46E9709FBD3"},{"vulnerable":true,"criteria":"cpe:2.3:o:juniper:junos:22.4:r3-s3:*:*:*:*:*:*","matchCriteriaId":"08E2562F-FB18-4347-8497-7D61B8157EBB"},{"vulnerable":true,"criteria":"cpe:2.3:o:juniper:junos:22.4:r3-s4:*:*:*:*:*:*","matchCriteriaId":"494D1D96-1DA2-4B0A-9536-1B5A4FDFCA09"},{"vulnerable":true,"criteria":"cpe:2.3:o:juniper:junos:22.4:r3-s5:*:*:*:*:*:*","matchCriteriaId":"60A1E37B-1990-44D9-87FE-300678243BE2"},{"vulnerable":true,"criteria":"cpe:2.3:o:juniper:junos:22.4:r3-s6:*:*:*:*:*:*","matchCriteriaId":"D306ED88-8700-4FD4-8919-3C85728C04C3"},{"vulnerable":true,"criteria":"cpe:2.3:o:juniper:junos:22.4:r3-s7:*:*:*:*:*:*","matchCriteriaId":"11340C63-A638-420C-85C9-1B4438C88D52"},{"vulnerable":true,"criteria":"cpe:2.3:o:juniper:junos:23.2:-:*:*:*:*:*:*","matchCriteriaId":"1A78CC80-E8B1-4CDA-BB35-A61833657FA7"},{"vulnerable":true,"criteria":"cpe:2.3:o:juniper:junos:23.2:r1:*:*:*:*:*:*","matchCriteriaId":"4B3B2FE1-C228-46BE-AC76-70C2687050AE"},{"vulnerable":true,"criteria":"cpe:2.3:o:juniper:junos:23.2:r1-s1:*:*:*:*:*:*","matchCriteriaId":"F1B16FF0-900F-4AEE-B670-A537139F6909"},{"vulnerable":true,"criteria":"cpe:2.3:o:juniper:junos:23.2:r1-s2:*:*:*:*:*:*","matchCriteriaId":"B227E831-30FF-4BE1-B8B2-31829A5610A6"},{"vulnerable":true,"criteria":"cpe:2.3:o:juniper:junos:23.2:r2:*:*:*:*:*:*","matchCriteriaId":"1ADA814B-EF98-45B1-AF7A-0C89688F7CA5"},{"vulnerable":true,"cr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