CVE-2026-33793 Privilege escalation in Junos OS

High 8.5 Published 9 Apr 2026 Updated 16 Apr 2026

A local low-privileged user can gain root privileges by executing malicious Python op scripts if unsigned script execution is enabled.

Exploited in the wild: Not known
Login needed: Any signed-in user
Attackable: Local or same network only
Victim action needed: Not needed
Fix: None listed

What is CVE-2026-33793?

CVE-2026-33793 is a high-severity vulnerability in Juniper Junos, published on 9 Apr 2026. It can only be exploited from the same machine or local network, with no action from the victim.

Official 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.

Weakness: CWE-250

Which versions are affected by CVE-2026-33793?

It affects 2 products.

Products include Juniper Junos, Juniper Junos Os Evolved.

How do I fix CVE-2026-33793?

No fix has been published for CVE-2026-33793 yet. Limit exposure of the affected software until one is available.

Is CVE-2026-33793 being exploited?

There is no known exploitation of CVE-2026-33793 in the wild and no public exploit code.

All Juniper Junos vulnerabilities

Sources

Also known as GHSA-fc25-pm3m-2gqh.