CVE-2026-102059 Command injection in Junos OS
An adjacent attacker can execute arbitrary root commands on Juniper devices via a rogue DHCP server exploiting the phone-home daemon.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-102059?
CVE-2026-102059 is a high-severity command injection vulnerability in Juniper Networks Junos OS, published on 14 Oct 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
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.
Weakness: CWE-78
Which versions are affected by CVE-2026-102059?
How do I fix CVE-2026-102059?
No fix has been published for CVE-2026-102059 yet. Limit exposure of the affected software until one is available.
Upgrade, and pass arguments to programs as a list instead of through a shell. More about Command injection.
Is CVE-2026-102059 being exploited?
There is no known exploitation of CVE-2026-102059 in the wild and no public exploit code.
Sources
Also known as GHSA-w9fm-9w6m-778h.