---
id: CVE-2026-102059
title: "An Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') vulnerability in the phone-home daemon (phcd) of Juniper Networks Junos OS and Junos OS Evolved on\_EX Series, SRX Series, and QFX Series allows…"
summary: "An Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') vulnerability in the phone-home daemon (phcd) of Juniper Networks Junos OS and Junos OS Evolved on\_EX Series, SRX Series, and QFX Series allows…"
severity: high
cvss: 8.8
cvssVector: 'CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'
cwe:
  - CWE-78
vendor: Juniper Networks
product: Junos OS
affected:
  - junos_os < 23.2R2-S7.7
  - junos_os >= 23.4 < 23.4R2-S8.13
  - junos_os >= 24.2 < 24.2R2-S5.5
  - junos_os >= 24.4 < 24.4R2-S5
  - junos_os >= 25.2 < 25.2R2-S2
  - junos_os >= 25.4 < 25.4R1-S3
  - junos_os >= 26.2 < 26.2R1-S2
  - junos_os_evolved < 23.2R2-S7.7-EVO
  - junos_os_evolved >= 23.4 < 23.4R2-S8.11-EVO
  - junos_os_evolved >= 24.2 < 24.2R2-S5.6-EVO
  - junos_os_evolved >= 24.4 < 24.4R2-S5-EVO
  - junos_os_evolved >= 25.2 < 25.2R2-S2-EVO
  - junos_os_evolved >= 25.4 < 25.4R1-S3-EVO
  - junos_os_evolved >= 26.2 < 26.2R1-S2-EVO
  - junos_os_evolved 23.4X100
  - junos_os_evolved >= 25.2X100 < 25.2X100-D35-EVO
  - junos_os_evolved >= 25.4X300 < 25.4X300-D40-EVO
published: '2026-10-14'
updated: '2026-10-16'
sourceUpdated: '2026-10-16T15:17:01.333'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-102059'
references:
  - url: 'https://supportportal.juniper.net/JSA112187'
    label: sirt@juniper.net
tags:
  - nvd
  - cve.org
epss: 0.03898
epssPercentile: 0.90202
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-10-16T03:56:44.231185Z'
ingestedAt: '2026-10-14T17:44:53.661Z'
---

## Overview

An Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') vulnerability in the phone-home daemon (phcd) of Juniper Networks Junos OS and Junos OS Evolved on EX Series, SRX Series, and QFX Series allows an adjacent unauthenticated attacker to execute arbitrary commands with root privileges via a rogue DHCP server.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.