CVE-2025-59957 | Juniper Junos OS up to 21.4R2/22.2R3-S2 -defaults[-flex].conf origin validation (JSA103146)

October 9, 2025 Yanac

A vulnerability described as critical has been identified in Juniper Junos OS up to 21.4R2/22.2R3-S2. This issue affects some unknown processing of the file /etc/config/-defaults[-flex].conf. The manipulation results in origin validation error.

This vulnerability was named CVE-2025-59957. An attack on the physical device is feasible. There is no available exploit.

Upgrading the affected component is recommended.VulDB Recent EntriesRead More