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.

The following software releases have been updated to resolve this specific issue: 21.2R3-S9, 21.4R3-S11, 22.2R3-S7, 22.4R3-S7, 23.2R2-S4, 23.4R2-S5, 24.2R2-S1, 24.4R1-S3, 24.4R2, 25.2R1, and all subsequent releases.

This issue is being tracked as 1848754 which is visible on the Customer Support website.

Note: Juniper SIRT's policy is not to evaluate releases which are beyond End of Engineering (EOE) or End of Life (EOL).

Utilize CLI authorization to disallow execution of the 'request interface' command.
Use access lists or firewall filters to limit access to the CLI only from trusted hosts and administrators.

2025-07-09: Initial Publication

• KB16613: Overview of the Juniper Networks SIRT Quarterly Security Bulletin Publication Process [juniper.net]
• KB16765: In which releases are vulnerabilities fixed? [juniper.net]
• KB16446: Common Vulnerability Scoring System (CVSS) and Juniper's Security Advisories [juniper.net]
• Report a Security Vulnerability - How to Contact the Juniper Networks Security Incident Response Team
• https://www.cve.org/CVERecord?id=CVE-2025-52963