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 ↗

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

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

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