Auth bypass in Juniper Junos
CVE-2025-30650
A Missing Authentication for Critical Function vulnerability in command processing of Juniper Networks Junos OS allows a privileged local attacker to gain access to Linux-based line cards as root. This issue affects systems running Junos OS using Linux-based line cards. Affected line cards include: * MPC7, MPC8, MPC9, MPC10, MPC11 * LC2101, LC2103 * LC480, LC4800, LC9600 * MX304 (built-in FPC) * MX-SPC3 * SRX5K-SPC3 * EX9200-40XS * FPC3-PTX-U2, FPC3-PTX-U3 * FPC3-SFF-PTX * LC1101, LC1102, LC1104, LC1105 This issue affects Junos OS: * all versions before 22.4R3-S8, * from 23.2 before 23.2R2-S6, * from 23.4 before 23.4R2-S6, * from 24.2 before 24.2R2-S3, * from 24.4 before 24.4R2, * from 25.2 before 25.2R2.
Vulnerability class: Broken Authentication
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.7 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.001 (2.6th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 3rd percentile — 2.6% 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 22.4, 23.2, 23.4
- Juniper Networks Junos OS — versions 0, 23.2, 23.4
Weakness classification (CWE)
References
- github.com/orangecertcc/security-research/security/advisories/GHSA-fwhc-gh5m-v8… (Third Party Advisory, third-party-advisory)
- kb.juniper.net/JSA107863 (vendor-advisory, Vendor Advisory)
Frequently asked questions
- What is CVE-2025-30650?
- CVE-2025-30650 is a medium-severity vulnerability in Juniper Junos, classified under Missing Authentication for Critical Function. CVSS score: 6.7/10. Published 2026-04-08.
- How severe is CVE-2025-30650?
- Medium severity. CVSS v3 base score is 6.7 out of 10.