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CVE-2026-33793

Junos OS and Junos OS Evolved: When an unsigned Python op script configuration is present, a local low privileged user can compromise the system

Published
Last modified
published
Not listed in CISA KEV
Fix
Fixed in 22.4R3-S7, 23.2R2-S4, 23.4R2-S6, 22.4R3-S7-EVO, 23.2R2-S4-EVO, and 2 more
None on Exploit-DB, Metasploit or GitHub
  • Exploitation: none
  • Automatable: no
  • Technical impact: total

Summary

An Execution with Unnecessary Privileges vulnerability in the User Interface (UI) of Juniper Networks Junos OS and Junos OS Evolved allows a local, low-privileged attacker to gain root privileges, thus compromising the system. When a configuration that allows unsigned Python op scripts is present on the device, a non-root user is able to execute malicious op scripts as a root-equivalent user, leading to privilege escalation.  This issue affects Junos OS:  • All versions before 22.4R3-S7,  • from 23.2 before 23.2R2-S4,  • from 23.4 before 23.4R2-S6, • from 24.2 before 24.2R1-S2, 24.2R2,  • from 24.4 before 24.4R1-S2, 24.4R2;  Junos OS Evolved:  • All versions before 22.4R3-S7-EVO,  • from 23.2 before 23.2R2-S4-EVO,  • from 23.4 before 23.4R2-S6-EVO, • from 24.2 before 24.2R2-EVO,  • from 24.4 before 24.4R1-S1-EVO, 24.4R2-EVO.

Timeline

  1. CVE published
  2. CISA SSVC assessment

    Exploitation: none · Automatable: no · Technical impact: total

  3. Record last updated

Affected versions

  • Juniper Networks Junos OS

    fixed in 22.4R3-S7; From 23.2 · fixed in 23.2R2-S4; From 23.4 · fixed in 23.4R2-S6

  • Juniper Networks Junos OS Evolved

    fixed in 22.4R3-S7-EVO; From 23.2 · fixed in 23.2R2-S4-EVO; From 23.4 · fixed in 23.4R2-S6-EVO; From 24.2 · fixed in 24.2R2-EVO

References 1

supportportal.juniper.net