CVE-2025-30650

Junos OS: Privileged local user can gain access to a Linux-based FPC as root

State: Published
Severity: 8.4 High
Published: Apr 8, 2026
Updated: Apr 13, 2026
Reserved: Mar 24, 2025

Description

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.

Scores

CVSS	Score	Vector	Source
4.0	8.4 High	CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:L/SI:L/SA:L/AU:N/R:A/V:C/RE:M/U:Amber	juniper
3.1	6.7 Medium	CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H	juniper

Weaknesses

CWE-306 Missing Authentication for Critical Function

Affected Products

Product	Versions
Junos OSJuniper Networks	before 22.4R3-S8Affected 23.2 to before 23.2R2-S6Affected 23.4 to before 23.4R2-S6Affected 24.2 to before 24.2R2-S3Affected 24.4 to before 24.4R2Affected 25.2 to before 25.2R2Affected

References

https://github.com/orangecertcc/security-research/security/advisories/GHSA-fwhc-gh5m-v8fqthird-party-advisory
https://kb.juniper.net/JSA107863vendor-advisory

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