CVE-2026-102059: Juniper Networks Junos OS

High severity, CVSS 8.8. EPSS: 3.9% chance of exploitation in the next 30 days.

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.

Affected products

• Juniper Networks Junos OS: before 23.2R2-S7.7 (fixed in 23.2R2-S7.7); from 23.4, before 23.4R2-S8.13 (fixed in 23.4R2-S8.13); from 24.2, before 24.2R2-S5.5 (fixed in 24.2R2-S5.5); from 24.4, before 24.4R2-S5 (fixed in 24.4R2-S5); from 25.2, before 25.2R2-S2 (fixed in 25.2R2-S2); from 25.4, before 25.4R1-S3 (fixed in 25.4R1-S3); …
• Juniper Networks Junos OS Evolved: before 23.2R2-S7.7-EVO (fixed in 23.2R2-S7.7-EVO); from 23.4, before 23.4R2-S8.11-EVO (fixed in 23.4R2-S8.11-EVO); from 24.2, before 24.2R2-S5.6-EVO (fixed in 24.2R2-S5.6-EVO); from 24.4, before 24.4R2-S5-EVO (fixed in 24.4R2-S5-EVO); from 25.2, before 25.2R2-S2-EVO (fixed in 25.2R2-S2-EVO); from 25.4, before 25.4R1-S3-EVO (fixed in 25.4R1-S3-EVO); …

Published 2026-10-14. Last modified 2026-10-16.