Junos OS (SRX firewalls)
CVE-2025-52963: A low-privileged user can disable an interface
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.
Published
Automatic summary from the vendor's CVE record. We haven't written a full analysis of this vulnerability yet.
Affected and fixed versions
| Product / branch | Fixed in |
|---|---|
| Junos OS 0 | 21.2R3-S9 or later |
| Junos OS 21.4 | 21.4R3-S11 or later |
| Junos OS 22.2 | 22.2R3-S7 or later |
| Junos OS 22.4 | 22.4R3-S7 or later |
| Junos OS 23.2 | 23.2R2-S4 or later |
| Junos OS 23.4 | 23.4R2-S5 or later |
| Junos OS 24.2 | 24.2R2-S1 or later |
| Junos OS 24.4 | 24.4R1-S3, 24.4R2 or later |
Always confirm against the vendor advisory, which lists every fixed hotfix.
What it is
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.
Workarounds
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.
Exploitation
Juniper SIRT is not aware of any malicious exploitation of this vulnerability.
Sources
KEV status, EPSS score and vendor data refreshed automatically, last on 13 Oct 2026.