6.9

CVE-2026-33803

Junos OS Evolved: A port which has been inadvertently exposed can be reached by an attacker

An Improper Restriction of Communication Channel to Intended Endpoints vulnerability in Juniper Networks Junos OS Evolved allows an unauthenticated, network-based attacker to cause a limited information disclosure and availability impact to the device.


Due to a wrong initialization, a process which should only be able to communicate internally within the device can be reached over the network via an open port. This leads to a device being inadvertently exposed and increased CPU cycles spent processing ingress packets.

This issue affects Junos OS Evolved:


  *  all versions before 23.2R2-S7-EVO,
  *  23.4 versions before 23.4R2-S8-EVO,
  *  24.2 versions before 24.2R2-S5-EVO,
  *  24.4 versions before 24.4R2-S4-EVO,
  *  25.2 versions before 25.2R2-S1-EVO,
  *  25.4 versions before 25.4R1-S2-EVO.
Daten sind bereitgestellt durch das CVE Programm von einer CVE Numbering Authority (CNA) (Unstrukturiert).
HerstellerJuniper Networks
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Produkt Junos OS Evolved
Default Statusunaffected
Version 0
Version < 23.2R2-S7-EVO
Status affected
Version 23.4
Version < 23.4R2-S8-EVO
Status affected
Version 24.2
Version < 24.2R2-S5-EVO
Status affected
Version 24.4
Version < 24.4R2-S4-EVO
Status affected
Version 25.2
Version < 25.2R2-S1-EVO
Status affected
Version 25.4
Version < 25.4R1-S2-EVO
Status affected
VulnDex Vulnerability Enrichment
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Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.35% 0.275
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
sirt@juniper.net 6.9 0 0
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:L/SC:N/SI:N/SA:N/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
sirt@juniper.net 6.5 3.9 2.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L
CWE-923 Improper Restriction of Communication Channel to Intended Endpoints

The product establishes a communication channel to (or from) an endpoint for privileged or protected operations, but it does not properly ensure that it is communicating with the correct endpoint.

https://supportportal.juniper.net/JSA110078