CVE-2025-52963 Junos OS: A low-privileged user can disable an interface

Medium 6.8 Published 11 Jul 2025 Updated 11 Jul 2025

A low-privileged user can disable network interfaces due to improper access control, causing a denial of service.

Exploited in the wild: Not known
Login needed: Any signed-in user
Attackable: Local or same network only
Victim action needed: Not needed
Fix: None listed

What is CVE-2025-52963?

CVE-2025-52963 is a medium-severity missing authorization vulnerability in Juniper Junos, published on 11 Jul 2025. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

An Improper Access Control vulnerability in the User Interface (UI) of Juniper Networks Junos OS allows a local, low-privileged attacker to bring down an interface, leading to a Denial-of-Service.

Users with "view" permissions can run a specific request interface command which allows the user to shut down the interface. This issue affects Junos OS:

* All versions before 21.2R3-S9, * from 21.4 before 21.4R3-S11, * from 22.2 before 22.2R3-S7, * from 22.4 before 22.4R3-S7, * from 23.2 before 23.2R2-S4, * from 23.4 before 23.4R2-S5, * from 24.2 before 24.2R2-S1, * from 24.4 before 24.4R1-S3, 24.4R2.

Weakness: CWE-284

Which versions are affected by CVE-2025-52963?

It affects 1 product.

Products include Juniper Junos.

How do I fix CVE-2025-52963?

No fix has been published for CVE-2025-52963 yet. Limit exposure of the affected software until one is available.

Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.

Is CVE-2025-52963 being exploited?

There is no known exploitation of CVE-2025-52963 in the wild and no public exploit code.

All Juniper Junos vulnerabilities

Sources

Also known as GHSA-8qj3-2ph6-53mq.