CVE-2026-57026
Full vulnerability record from the local CVENow database.
Description
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. This leads to a complete service outage until the system has automatically recovered. This issue affects Junos OS on MX Series with SPC3 and SRX Series: * all versions before 23.2R2-S7, * 23.4 versions before 23.4R2-S8, * 24.2 versions before 24.2R2-S5, * 24.4 versions before 24.4R2-S4, * 25.2 versions before 25.2R2, * 25.4 versions before 25.4R1-S2.
View original CVE JSON
{
"id": "CVE-2026-57026",
"sourceIdentifier": "[email protected]",
"published": "2026-07-09T22:17:07.923",
"lastModified": "2026-10-25T15:10:00.147",
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"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. 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."
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"value": "Una vulnerabilidad de validación incorrecta de la corrección sintáctica 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 denegación de servicio (DoS). Si el ALG SIP está habilitado en un dispositivo afectado, el procesamiento de un paquete de invitación SIP malformado causará un fallo y reinicio del demonio de procesamiento de flujo (flowd). Esto conduce a una interrupción completa del servicio hasta que el sistema se haya recuperado automáticamente.\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."
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},
{
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},
{
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"matchCriteriaId": "2FDDC897-747F-44DD-9599-7266F9B5B7B1"
},
{
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]
}
]
}
],
"references": [
{
"url": "https://supportportal.juniper.net/JSA110086",
"source": "[email protected]",
"tags": [
"Vendor Advisory"
]
}
]
}