Vulnerability in Juniper Junos
CVE-2025-52963
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.001 (2.7th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 3rd percentile — 2.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.001 · newest: 0.001 · change: -0.000
Affected products
- Juniper Junos — versions 21.2, 21.4, 22.2
- Juniper Networks Junos OS — versions 0, 21.4, 22.2
Weakness classification (CWE)
Public proof-of-concept exploits
References
- supportportal.juniper.net/JSA100078 (vendor-advisory, Vendor Advisory)
Frequently asked questions
- What is CVE-2025-52963?
- CVE-2025-52963 is a medium-severity vulnerability in Juniper Junos, classified under Improper Access Control. CVSS score: 5.5/10. Published 2025-07-11.
- How severe is CVE-2025-52963?
- Medium severity. CVSS v3 base score is 5.5 out of 10.
- Is CVE-2025-52963 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.