CVE-2026-57022

Full vulnerability record from the local CVENow database.
Description

An Improper Check for Unusual or Exceptional Conditions vulnerability in the Packet Forwarding Engine (PFE) of Juniper Networks Junos OS on MX with SPC3 and SRX Series allows an unauthenticated, network-based attacker to cause a Denial-of-Service (DoS). When an affected device initiates a TCP connection to an attacker-controlled system that responds with a specific packet, this causes a PFE crash and restart, which affects all services until the system has automatically recovered. This issue can happen among others in the following scenarios: ALG, SSL proxy, UTM, RTLOG, AppQoE probing, AAMW, ICAP, URL filtering. This issue affects Junos OS on MX Series with SPC3, SRX5k Series with SPC3, SRX1600 Series, SRX2300 Series, SRX4000 Series, and vSRX Series: * all versions before 23.2R2-S4, * 23.4 versions before 23.4R2-S5, * 24.2 versions before 24.2R2.
Severity
HIGH
CVSS score
8.2 (v4.0)
Vulnerability status
Analyzed
Source identifier
[email protected]
Published
2026-07-09 22:17:07.233000
Last modified
2026-10-25 15:10:00.147000
View original CVE JSON
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  "sourceIdentifier": "[email protected]",
  "published": "2026-07-09T22:17:07.233",
  "lastModified": "2026-10-25T15:10:00.147",
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      "value": "An Improper Check for Unusual or Exceptional Conditions vulnerability in the Packet Forwarding Engine (PFE) of Juniper Networks Junos OS on MX with SPC3 and SRX Series allows an unauthenticated, network-based attacker to cause a Denial-of-Service (DoS).\n\nWhen an affected device initiates a TCP connection to an attacker-controlled system that responds with a specific packet, this causes a PFE crash and restart, which affects all services until the system has automatically recovered.\nThis issue can happen among others in the following scenarios: ALG, SSL proxy, UTM, RTLOG, AppQoE probing, AAMW, ICAP, URL filtering.\n\nThis issue affects Junos OS on MX Series with SPC3, SRX5k Series with SPC3, SRX1600 Series, SRX2300 Series, SRX4000 Series, and vSRX Series:\n\n  *  all versions before 23.2R2-S4,\n  *  23.4 versions before 23.4R2-S5,\n  *  24.2 versions before 24.2R2."
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      "value": "Una vulnerabilidad de Comprobación Incorrecta de Condiciones Inusuales o Excepcionales en el Motor de Reenvío de Paquetes (PFE) de Juniper Networks Junos OS en MX con SPC3 y SRX Series permite a un atacante no autenticado, basado en red, causar una Denegación de Servicio (DoS).\n\nCuando un dispositivo afectado inicia una conexión TCP a un sistema controlado por el atacante que responde con un paquete específico, esto causa una caída y reinicio del PFE, lo que afecta a todos los servicios hasta que el sistema se ha recuperado automáticamente.\nEste problema puede ocurrir, entre otros, en los siguientes escenarios: ALG, proxy SSL, UTM, RTLOG, sondeo de AppQoE, AAMW, ICAP, filtrado de URL.\n\nEste problema afecta a Junos OS en MX Series con SPC3, SRX5k Series con SPC3, SRX1600 Series, SRX2300 Series, SRX4000 Series y vSRX Series:\n\n  *  todas las versiones anteriores a 23.2R2-S4,\n  *  versiones 23.4 anteriores a 23.4R2-S5,\n  *  versiones 24.2 anteriores a 24.2R2."
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