CVE-2026-57026

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This leads to a complete service outage until the system has automatically recovered.<br></p><p><br>This issue affects Junos OS on MX Series with SPC3 and SRX Series:<br></p><ul><li>all versions before 23.2R2-S7,</li><li>23.4 versions before 23.4R2-S8,</li><li>24.2 versions before 24.2R2-S5,</li><li>24.4 versions before 24.4R2-S4,</li><li>25.2 versions before 25.2R2,</li><li>25.4 versions before 25.4R1-S2.</li></ul><br><p></p>"}], "value": "An Improper Validation of Syntactic Correctness of Input vulnerability in the SIP plugin of Juniper Networks Junos OS on MX Series with SPC3 and SRX Series allows an unauthenticated, network-based attacker to cause a Denial-of-Service (DoS).If the SIP ALG is enabled on an affected device, the processing of a malformed SIP invite packet will cause a flow processing daemon (flowd) crash and restart. 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This leads to a complete service outage until the system has automatically recovered.\n\n\n\nThis issue affects Junos OS on MX Series with SPC3 and SRX Series:\n\n\n * all versions before 23.2R2-S7,\n * 23.4 versions before 23.4R2-S8,\n * 24.2 versions before 24.2R2-S5,\n * 24.4 versions before 24.4R2-S4,\n * 25.2 versions before 25.2R2,\n * 25.4 versions before 25.4R1-S2.", "supportingMedia": [{"type": "text/html", "value": "An Improper Validation of Syntactic Correctness of Input vulnerability in the SIP plugin of Juniper Networks Junos OS on MX Series with SPC3 and SRX Series allows an unauthenticated, network-based attacker to cause a Denial-of-Service (DoS).<p>If the SIP ALG is enabled on an affected device, the processing of a malformed SIP invite packet will cause a flow processing daemon (flowd) crash and restart. 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This leads to a complete service outage until the system has automatically recovered.\n\n\n\nThis issue affects Junos OS on MX Series with SPC3 and SRX Series:\n\n\n * all versions before 23.2R2-S7,\n * 23.4 versions before 23.4R2-S8,\n * 24.2 versions before 24.2R2-S5,\n * 24.4 versions before 24.4R2-S4,\n * 25.2 versions before 25.2R2,\n * 25.4 versions before 25.4R1-S2."}, {"lang": "es", "value": "Una vulnerabilidad de validaci\u00f3n incorrecta de la correcci\u00f3n sint\u00e1ctica de la entrada en el plugin SIP de Juniper Networks Junos OS en las series MX con SPC3 y SRX permite a un atacante no autenticado y basado en red causar una denegaci\u00f3n de servicio (DoS). Si el ALG SIP est\u00e1 habilitado en un dispositivo afectado, el procesamiento de un paquete de invitaci\u00f3n SIP malformado causar\u00e1 un fallo y reinicio del demonio de procesamiento de flujo (flowd). Esto conduce a una interrupci\u00f3n completa del servicio hasta que el sistema se haya recuperado autom\u00e1ticamente.\n\nEste problema afecta a Junos OS en las series MX con SPC3 y SRX:\n\n * todas las versiones anteriores a 23.2R2-S7,\n * versiones 23.4 anteriores a 23.4R2-S8,\n * versiones 24.2 anteriores a 24.2R2-S5,\n * versiones 24.4 anteriores a 24.4R2-S4,\n * versiones 25.2 anteriores a 25.2R2,\n * versiones 25.4 anteriores a 25.4R1-S2."}], "id": "CVE-2026-57026", "lastModified": "2026-10-25T15:10:00.147", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 3.6, "source": "sirt@juniper.net", "type": "Secondary"}], "cvssMetricV40": [{"cvssData": {"Automatable": "YES", "Recovery": "AUTOMATIC", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "NONE", "attackVector": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 8.7, "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": "NONE", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "LOW", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "userInteraction": "NONE", "valueDensity": "NOT_DEFINED", "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", "version": "4.0", "vulnAvailabilityImpact": "HIGH", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "NONE", "vulnerabilityResponseEffort": "MODERATE"}, "source": "sirt@juniper.net", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-57026", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-07-10T14:33:00.224298Z", "version": "2.0.3"}}]}, "published": "2026-07-09T22:17:07.923", "references": [{"source": "sirt@juniper.net", "tags": ["Vendor Advisory"], "url": "https://supportportal.juniper.net/JSA110086"}], "sourceIdentifier": "sirt@juniper.net", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-1286"}], "source": "sirt@juniper.net", "type": "Secondary"}]}

{}

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