CVE-2025-59957 Junos OS: EX4600 Series and QFX5000 Series: An attacker with physical access can open a persistent backdoor

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...

CVE-2025-59957

CVE-2025-59957 affects Juniper Networks Junos OS on EX4600 Series and QFX5000 Series switches. Affected versions: all prior to 21.4R3 and 22.2 prior to 22.2R3-S3. The vulnerability is a runtime/Origin Validation Error in an insufficient protected file , allowing an unauthenticated attacker with p...