ESB-2026.3438

=========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2026.3438 JSA107863 : 2026-04 Security Bulletin: Junos OS: Privileged local user can gain access to a Linux-based FPC as root (CVE-2025-30650) 9 April 2026 =========================================================================== AUSCERT Security Bulletin Summary --------------------------------- Product: Juniper Junos OS Publisher: Juniper Networks Operating System: Juniper Resolution: Patch/Upgrade CVE Names: CVE-2025-30650 Original Bulletin: https://supportportal.juniper.net/s/article/2026-04-Security-Bulletin-Junos-OS-Privileged-local-user-can-gain-access-to-a-Linux-based-FPC-as-root-CVE-2025-30650 Comment: CVSS (Max): 6.7 CVE-2025-30650 (CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H) CVSS Source: Juniper Networks Calculator: https://www.first.org/cvss/calculator/3.1#CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H EPSS (Max): None available when published - --------------------------BEGIN INCLUDED TEXT-------------------- Article ID: JSA107863 Product Affected: This issue affects all versions of Junos OS. Severity Level: Medium CVSS Score: CVSS: v3.1: 6.7 (CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H) CVSS: v4.0: 8.4 (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) Problem: A Missing Authentication for Critical Function vulnerability in command processing of Juniper Networks Junos OS allows a privileged local attacker to gain access to line cards running Junos OS Evolved as root. This issue affects systems running Junos OS using Linux-based line cards. Affected line cards include: o MPC7, MPC8, MPC9, MPC10, MPC11 o LC2101, LC2103 o LC480, LC4800, LC9600 o MX304 (built-in FPC) o MX-SPC3 o SRX5K-SPC3 o EX9200-40XS o FPC3-PTX-U2, FPC3-PTX-U3 o FPC3-SFF-PTX o LC1101, LC1102, LC1104, LC1105 This issue affects Junos OS: o all versions before 22.4R3-S8, o from 23.2 before 23.2R2-S6, o from 23.4 before 23.4R2-S6, o from 24.2 before 24.2R2-S3, o from 24.4 before 24.4R2, o from 25.2 before 25.2R2. Juniper SIRT is not aware of any malicious exploitation of this vulnerability. This issue was discovered during external security research. Solution: The following software releases have been updated to resolve this specific issue: 22.4R3-S8, 23.2R2-S6, 23.4R2-S6, 24.2R2-S3, 24.4R2, 25.2R2, 25.4R1, and all subsequent releases. This issue is being tracked as 1872703 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). Workaround: There are no known workarounds for this issue. Severity Assessment: Information for how Juniper Networks uses CVSS can be found at KB 16446 "Common Vulnerability Scoring System (CVSS) and Juniper's Security Advisories." Modification History: 2026-04-08: Initial Publication Related Information: o KB16613: Overview of the Juniper Networks SIRT Quarterly Security Bulletin Publication Process o KB16765: In which releases are vulnerabilities fixed? o KB16446: Common Vulnerability Scoring System (CVSS) and Juniper's Security Advisories o Report a Security Vulnerability - How to Contact the Juniper Networks Security Incident Response Team o https://www.cve.org/CVERecord?id=CVE-2025-30650 Acknowledgements Juniper SIRT would like to acknowledge and thank Pierre EMERIAUD & Orange CERT-CC from Orange group for responsibly reporting this vulnerability. Last Updated: 2026-04-08 Created: 2026-04-08 - --------------------------END INCLUDED TEXT---------------------- You have received this e-mail bulletin as a result of your organisation's registration with AUSCERT. 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