CVE-2026-33803

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"21728887-97A1-4AC7-8121-B6CEA5D6BAB4", "vulnerable": true}, {"criteria": "cpe:2.3:o:juniper:junos_os_evolved:25.4:r1-s1:*:*:*:*:*:*", "matchCriteriaId": "F96EA365-93FE-423E-AC9F-CABEAFF25B0C", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "An Improper Restriction of Communication Channel to Intended Endpoints vulnerability in Juniper Networks Junos OS Evolved allows an unauthenticated, network-based attacker to cause a limited information disclosure and availability impact to the device.\n\n\nDue to a wrong initialization, a process which should only be able to communicate internally within the device can be reached over the network via an open port. This leads to a device being inadvertently exposed and increased CPU cycles spent processing ingress packets.\n\nThis issue affects Junos OS Evolved:\n\n\n * all versions before 23.2R2-S7-EVO,\n * 23.4 versions before 23.4R2-S8-EVO,\n * 24.2 versions before 24.2R2-S5-EVO,\n * 24.4 versions before 24.4R2-S4-EVO,\n * 25.2 versions before 25.2R2-S1-EVO,\n * 25.4 versions before 25.4R1-S2-EVO."}, {"lang": "es", "value": "Una vulnerabilidad de Restricci\u00f3n Inadecuada del Canal de Comunicaci\u00f3n a los Puntos Finales Previstos en Juniper Networks Junos OS Evolved permite a un atacante no autenticado y basado en la red causar una limitada revelaci\u00f3n de informaci\u00f3n e impacto en la disponibilidad en el dispositivo.\n\nDebido a una inicializaci\u00f3n incorrecta, un proceso que solo deber\u00eda poder comunicarse internamente dentro del dispositivo puede ser alcanzado a trav\u00e9s de la red mediante un puerto abierto. Esto lleva a que un dispositivo quede expuesto inadvertidamente y a un aumento de los ciclos de CPU dedicados al procesamiento de paquetes de entrada.\n\nEste problema afecta a Junos OS Evolved:\n\n * todas las versiones anteriores a 23.2R2-S7-EVO,\n * versiones 23.4 anteriores a 23.4R2-S8-EVO,\n * versiones 24.2 anteriores a 24.2R2-S5-EVO,\n * versiones 24.4 anteriores a 24.4R2-S4-EVO,\n * versiones 25.2 anteriores a 25.2R2-S1-EVO,\n * versiones 25.4 anteriores a 25.4R1-S2-EVO."}], "id": "CVE-2026-33803", "lastModified": "2026-10-25T17:10:00.197", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "LOW", "baseScore": 6.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 2.5, "source": "sirt@juniper.net", "type": "Secondary"}], "cvssMetricV40": [{"cvssData": {"Automatable": "YES", "Recovery": "USER", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "NONE", "attackVector": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 6.9, "baseSeverity": "MEDIUM", "confidentialityRequirement": "NOT_DEFINED", "exploitMaturity": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "privilegesRequired": "NONE", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "userInteraction": "NONE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:L/SC:N/SI:N/SA:N/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:U/V:X/RE:M/U:X", "version": "4.0", "vulnAvailabilityImpact": "LOW", "vulnConfidentialityImpact": "LOW", "vulnIntegrityImpact": "NONE", "vulnerabilityResponseEffort": "MODERATE"}, "source": "sirt@juniper.net", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-33803", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-07-10T13:30:15.593698Z", "version": "2.0.3"}}]}, "published": "2026-07-09T22:17:03.807", "references": [{"source": "sirt@juniper.net", "tags": ["Vendor Advisory"], "url": "https://supportportal.juniper.net/JSA110078"}], "sourceIdentifier": "sirt@juniper.net", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-923"}], "source": "sirt@juniper.net", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[0,23.2R2-S7-EVO)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[23.4,23.4R2-S8-EVO)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[24.2,24.2R2-S5-EVO)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[24.4,24.4R2-S4-EVO)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[25.2,25.2R2-S1-EVO)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[25.4,25.4R1-S2-EVO)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "Junos OS Evolved", "source": "cna", "vendor": "Juniper Networks"}, "product": "junos_os_evolved", "vendor": "juniper_networks"}], "created": "2026-07-09T22:30:05.353206+00:00", "updated": "2026-08-01T14:00:06.208805+00:00", "vendors": ["juniper_networks", "juniper_networks$PRODUCT$junos_os_evolved"]}