CVE-2026-33793

High

Description

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.

SeverityHigh
CVSS7.8
Exploit probability—
ProductJuniper Junos
PublishedApr 9, 2026
First seenApr 9, 2026
Weakness typeCWE-250CWE-250

How to fix

Update
  • juniper junos22.4 or later
  • juniper junos_os_evolved22.4 or later

Affected products

ProductAffected versionsFixed in
juniper junosv < 22.4, 22.4, 23.2, 23.4, 24.2, 24.422.4
juniper junos_os_evolvedv < 22.4, 22.4, 23.2, 23.4, 24.2, 24.422.4

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