cvedb.io
CVE-2025-59957
MEDIUM · CVSS 6.8
EPSS exploitation probability: 0%
Published 2025-10-09T16:15:45.657 · Last modified 2026-06-17T09:46:55.347

Summary

An Origin Validation Error vulnerability in an insufficient protected file of Juniper Networks Junos OS on EX4600 Series and QFX5000 Series allows an unauthenticated attacker with physical access to the device to create a backdoor which allows complete control of the system. When a device isn't configured with a root password, an attacker can modify a specific file. It's contents will be added to the Junos configuration of the device without being visible. This allows for the addition of any configuration unknown to the actual operator, which includes users, IP addresses and other configuration which could allow unauthorized access to the device. This exploit is persistent across reboots and even zeroization. The indicator of compromise is a modified /etc/config/<platform>-defaults[-fl

Affected products

juniper — junos

Does this affect you?

Add your gear to cvedb and we'll alert you only when juniper ships something exploited.

Check my exposure →

References

This product uses data from the NVD API but is not endorsed or certified by the NVD. Informational only; not professional security advice.