---
title: "CVE-2026-102059: Juniper Networks Junos OS - OS Command Injection"
description: "Juniper Networks Junos OS and Junos OS Evolved on EX Series, SRX Series, and QFX Series contain an OS command injection caused by improper neutralization of special elements in the phone-home daemon (phcd), letting adjacent unauthenticated attackers execute arbitrary commands with root privileges via a rogue DHCP server."
url: https://panop.io/threat-heartbeat/CVE-2026-102059/
---

# CVE-2026-102059 Juniper Networks Junos OS - OS Command Injection

Juniper Networks Junos OS and Junos OS Evolved on EX Series, SRX Series, and QFX Series contain an OS command injection caused by improper neutralization of special elements in the phone-home daemon (phcd), letting adjacent unauthenticated attackers execute arbitrary commands with root privileges via a rogue DHCP server.

CVSS base score 8.8 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Not required

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-102059)

## Details

Type

OS Command Injection

Impact

Remote Code Execution, Privilege Escalation

CVSS vector

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Published

14 October 2026

Updated

15 October 2026

Weakness

[CWE-78](https://cwe.mitre.org/data/definitions/78.html)

## Vendor fix

Update to the latest Junos OS and Junos OS Evolved versions with the fix applied.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-102059](https://nvd.nist.gov/vuln/detail/CVE-2026-102059)
- [https://supportportal.juniper.net/JSA112187](https://supportportal.juniper.net/JSA112187)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

Panop answers these inside your environment, for this CVE and every other finding.

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