CVE Watch10 jul 2026

CVE-2026-57031

An Improper Check for Unusual or Exceptional Conditions vulnerability in the packet forwarding engine (PFE) of Juniper Networks Junos OS on

CVSS

4.7

Medio

EPSS

0.2%

p15

KEV

—

Exploit Today

0-100

Publicado: 9 jul 2026 · Última mod.: 10 jul 2026 · CWE-754

EPSS · 30d

0.2%EPSS · 30 días0.2%

2026-07-102026-07-18

Descripción técnica

An Improper Check for Unusual or Exceptional Conditions vulnerability in the packet forwarding engine (PFE) of Juniper Networks Junos OS on MX Series allows adjacent subscribers to bypass configured firewall filters. On MX Series devices with MPC10/11, LC4800/9600, and MX304 with subscribers configured on static interfaces, ingress firewall filters are not enforced, so that neither protocol level nor upstream bandwidth limitation are in effect. This issue affects Junos OS on MX with MPC10/11, LC4800/9600/4802, and MX304: * 23.2 versions from 23.2R2-S1 before 23.2R2-S7, * 23.4 versions from 23.4R2 before 23.4R2-S7, * 24.2 versions before 24.2R2-S3, * 24.4 versions before 24.4R2-S2, * 25.2 versions before 25.2R2.

Referencias oficiales

supportportal.juniper.nethttps://supportportal.juniper.net/JSA110091

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