{"resultsPerPage":1,"startIndex":0,"totalResults":1,"format":"NVD_CVE","version":"2.0","timestamp":"2026-05-07T19:43:22.567","vulnerabilities":[{"cve":{"id":"CVE-2026-21918","sourceIdentifier":"sirt@juniper.net","published":"2026-01-15T21:16:08.050","lastModified":"2026-01-23T19:41:38.067","vulnStatus":"Analyzed","cveTags":[],"descriptions":[{"lang":"en","value":"A Double Free vulnerability in the flow processing daemon (flowd) of Juniper Networks Junos OS on SRX and MX Series allows an unauthenticated, network-based attacker to cause a Denial-of-Service (DoS). On all SRX and MX Series platforms, when during TCP session establishment a specific sequence of packets is encountered a double free happens. This causes flowd to crash and the respective FPC to restart.\n\n\n\n\n\nThis issue affects Junos OS on SRX and MX Series:\n\n\n\n  *  all versions before 22.4R3-S7,\n  *  23.2 versions before 23.2R2-S3,\n  *  23.4 versions before 23.4R2-S4,\n  *  24.2 versions before 24.2R2."},{"lang":"es","value":"Una vulnerabilidad de doble liberación en el demonio de procesamiento de flujo (flowd) de Juniper Networks Junos OS en las series SRX y MX permite a un atacante no autenticado y basado en red causar una Denegación de Servicio (DoS). En todas las plataformas de las series SRX y MX, cuando durante el establecimiento de una sesión TCP se encuentra una secuencia específica de paquetes, ocurre una doble liberación. Esto provoca que flowd se bloquee y que el FPC respectivo se reinicie.\n\nEste problema afecta a Junos OS en las series SRX y MX:\n\n  *  todas las versiones anteriores a 22.4R3-S7,\n  *  versiones 23.2 anteriores a 23.2R2-S3,\n  *  versiones 23.4 anteriores a 23.4R2-S4,\n  *  versiones 24.2 anteriores a 24.2R2."}],"metrics":{"cvssMetricV40":[{"source":"sirt@juniper.net","type":"Secondary","cvssData":{"version":"4.0","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/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":8.7,"baseSeverity":"HIGH","attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"NONE","privilegesRequired":"NONE","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: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}]},"weaknesses":[{"source":"sirt@juniper.net","type":"Primary","description":[{"lang":"en","value":"CWE-415"}]}],"configurations":[{"operator":"AND","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: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,"criteria":"cpe:2.3:o:juniper:junos:23.2:r2-s1:*:*:*:*:*:*","matchCriteriaId":"A6FB32DF-D062-4FB9-8777-452978BEC7B7"},{"vulnera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