CVE-2026-33788

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in the Flexible PIC Concentrators (FPCs) of Juniper Networks Junos OS Evolved on PTX Series allows a local, authenticated attacker with low privileges to gain direct access to FPCs installed in the device.\n\nA local user with low privileges can gain direct access to the installed FPCs as a high privileged user, which can potentially lead to a full compromise of the affected component.\n\nThis issue affects\u00a0Junos OS Evolved on PTX10004, PTX10008, PTX100016, with JNP10K-LC1201 or JNP10K-LC1202:\n\n\n\n\n * All versions before 21.2R3-S8-EVO,\n * 21.4-EVO versions before 21.4R3-S7-EVO,\n * 22.2-EVO versions before 22.2R3-S4-EVO,\n * 22.3-EVO versions before 22.3R3-S3-EVO,\n * 22.4-EVO versions before 22.4R3-S2-EVO,\n * 23.2-EVO versions before 23.2R2-EVO."}, {"lang": "es", "value": "Una vulnerabilidad de autenticaci\u00f3n faltante para funci\u00f3n cr\u00edtica en los Concentradores PIC Flexibles (FPCs) de Juniper Networks Junos OS Evolved en la serie PTX permite a un atacante local, autenticado con bajos privilegios, obtener acceso directo a los FPCs instalados en el dispositivo.\n\nUn usuario local con bajos privilegios puede obtener acceso directo a los FPCs instalados como un usuario con altos privilegios, lo que puede llevar potencialmente a un compromiso total del componente afectado.\n\nEste problema afecta a Junos OS Evolved en PTX10004, PTX10008, PTX100016, con JNP10K-LC1201 o JNP10K-LC1202:\n\n * Todas las versiones anteriores a 21.2R3-S8-EVO,\n * Versiones 21.4-EVO anteriores a 21.4R3-S7-EVO,\n * Versiones 22.2-EVO anteriores a 22.2R3-S4-EVO,\n * Versiones 22.3-EVO anteriores a 22.3R3-S3-EVO,\n * Versiones 22.4-EVO anteriores a 22.4R3-S2-EVO,\n * Versiones 23.2-EVO anteriores a 23.2R2-EVO."}], "id": "CVE-2026-33788", "lastModified": "2026-10-26T21:10:00.170", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.9, "source": "sirt@juniper.net", "type": "Secondary"}], "cvssMetricV40": [{"cvssData": {"Automatable": "YES", "Recovery": "USER", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "NONE", "attackVector": "LOCAL", "availabilityRequirement": "NOT_DEFINED", "baseScore": 8.5, "baseSeverity": "HIGH", "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": "LOW", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "LOW", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "userInteraction": "NONE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/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:U/V:X/RE:M/U:X", "version": "4.0", "vulnAvailabilityImpact": "HIGH", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "HIGH", "vulnerabilityResponseEffort": "MODERATE"}, "source": "sirt@juniper.net", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-33788", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-04-10T03:56:13.066855Z", "version": "2.0.3"}}]}, "published": "2026-04-09T22:16:28.593", "references": [{"source": "sirt@juniper.net", "tags": ["Vendor Advisory"], "url": "https://kb.juniper.net/JSA107806"}], "sourceIdentifier": "sirt@juniper.net", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-306"}], "source": "sirt@juniper.net", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": ["ptx_series"], "status": "affected", "versions": {"scheme": "generic", "value": "[0,21.2R3-S8-EVO)"}}, {"platform": ["ptx_series"], "status": "affected", "versions": {"scheme": "generic", "value": "[21.4-EVO,21.4R3-S7-EVO)"}}, {"platform": ["ptx_series"], "status": "affected", "versions": {"scheme": "generic", "value": "[22.2-EVO,22.2R3-S4-EVO)"}}, {"platform": ["ptx_series"], "status": "affected", "versions": {"scheme": "generic", "value": "[22.3-EVO,22.3R3-S3-EVO)"}}, {"platform": ["ptx_series"], "status": "affected", "versions": {"scheme": "generic", "value": "[22.4-EVO,22.4R3-S2-EVO)"}}, {"platform": ["ptx_series"], "status": "affected", "versions": {"scheme": "generic", "value": "[23.2-EVO,23.2R2-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"}], "analysis": {"en": {"generated_at": "2026-04-09T22:22:39.971403+00:00", "value": {"mitigation_remediation": ["Apply a Junos OS Evolved release that includes the fix (21.2R3\u2011S8\u2011EVO or any later version)", "Restrict CLI access using access lists or firewall filters so only trusted hosts and administrators can connect", "If an upgrade is not immediately possible, limit exposure of local low\u2011privileged accounts or enforce stricter segregation of control functions"], "summary": {"action": "Immediate Patch", "impact": "Privilege escalation enabling full compromise"}, "threat_synthesis": {"affected_systems": "The vulnerability affects Junos OS Evolved running on the PTX series devices PTX10004, PTX10008, and PTX100016 that are equipped with JNP10K-LC1201 or JNP10K-LC1202 modules. All firmware releases before 21.2R3\u2011S8\u2011EVO, the 21.4\u2011EVO series before 21.4R3\u2011S7\u2011EVO, the 22.2\u2011EVO series before 22.2R3\u2011S4\u2011EVO, the 22.3\u2011EVO series before 22.3R3\u2011S3\u2011EVO, the 22.4\u2011EVO series before 22.4R3\u2011S2\u2011EVO, and the 23.2\u2011EVO series before 23.2R2\u2011EVO are impacted.", "description_and_impact": "A missing authentication flaw in the Flexible PIC Concentrators of Juniper Networks Junos OS Evolved allows a local user with low privileges to bypass normal controls and obtain direct access to the installed FPCs as a high privileged user. This escalation can lead to a complete takeover of the affected component and, potentially, the overall device.", "risk_and_exploitability": "With a CVSS score of 8.5, this issue poses a high severity risk; its EPSS score is not publicly available and it is not listed in the CISA KEV catalog. The attack requires local access and an authenticated low\u2011privileged account. By exploiting the missing authentication, the attacker can gain unauthorized high\u2011privilege access to the FPCs, potentially enabling full device compromise. Due to the local nature of the vector and the need for credentialed access, the exploitability is moderate to high within environments where low\u2011privilege users can interact with the device CLI."}}}}, "created": "2026-04-10T08:37:12.067796+00:00", "updated": "2026-04-10T09:28:17.159399+00:00", "vendors": ["juniper_networks", "juniper_networks$PRODUCT$junos_os_evolved"]}