Main Vulnerability Database SB2026050825

SB2026050825 - Privilege escalation in Junos OS

Published: May 8, 2026

Security Bulletin ID SB2026050825

CSH Severity

Low

Patch available

YES

Number of vulnerabilities 1

Exploitation vector Local access

Highest impact Code execution

Breakdown by Severity

Low
Medium
High
Critical

Description

This security bulletin contains information about 1 vulnerability.

1) Missing Authentication for Critical Function (CVE-ID: CVE-2025-30650)

CWE-ID: CWE-306 - Missing Authentication for Critical Function

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear

The vulnerability allows a local privileged user to gain root access to a Linux-based FPC.

The vulnerability exists due to missing authentication for critical function in command processing when processing commands for Linux-based line cards. A local privileged user can invoke a critical function to gain root access to a Linux-based FPC.

Only systems using Linux-based line cards running Junos OS Evolved are vulnerable.

Remediation

Install update from vendor's website.

References

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