CVE-2026-33793

published 2026-04-09

CVE-2026-33793: An Execution with Unnecessary Privileges vulnerability in the User Interface (UI) of Juniper Networks Junos OS and Junos OS Evolved allows a local…

high 8.5 CVSS 4.0

AV L AC L AT N PR L UI N VC H VI H VA H SC N SI N SA L E X CR X IR X AR X MAV X MAC X MAT X MPR X MUI X MVC X MVI X MVA X MSC X MSI X MSA X S X AU X R X V X RE X U X

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.

Affected

11 ranges

Vendor	Product	Version range	Fixed in
juniper	junos_os	—	—
juniper_networks	junos_os	< 22.4R3-S7	22.4R3-S7
juniper_networks	junos_os	>= 23.2 < 23.2R2-S4	23.2R2-S4
juniper_networks	junos_os	>= 23.4 < 23.4R2-S6	23.4R2-S6
juniper_networks	junos_os	>= 24.2 < 24.2R1-S2, 24.2R2	24.2R1-S2, 24.2R2
juniper_networks	junos_os	>= 24.4 < 24.4R1-S2, 24.4R2	24.4R1-S2, 24.4R2
juniper_networks	junos_os_evolved	< 22.4R3-S7-EVO	22.4R3-S7-EVO
juniper_networks	junos_os_evolved	>= 23.2 < 23.2R2-S4-EVO	23.2R2-S4-EVO
juniper_networks	junos_os_evolved	>= 23.4 < 23.4R2-S6-EVO	23.4R2-S6-EVO
juniper_networks	junos_os_evolved	>= 24.2 < 24.2R2-EVO	24.2R2-EVO
juniper_networks	junos_os_evolved	>= 24.4 < 24.4R1-S1-EVO, 24.4R2-EVO	24.4R1-S1-EVO, 24.4R2-EVO

CWE-250