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CVE-2026-33793: CWE-250: Execution with Unnecessary Privileges in Juniper Networks Junos OS

0
High
VulnerabilityCVE-2026-33793cvecve-2026-33793cwe-250
Published: Thu Apr 09 2026 (04/09/2026, 21:24:50 UTC)
Source: CVE Database V5
Vendor/Project: Juniper Networks
Product: Junos OS

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.

AI-Powered Analysis

Machine-generated threat intelligence

AILast updated: 04/10/2026, 00:50:51 UTC

Technical Analysis

This vulnerability arises from the Junos OS User Interface allowing execution of unsigned Python operational scripts with root-equivalent privileges when such configuration is enabled. A local attacker with low privileges can exploit this to escalate to root, compromising the system. Affected versions include all releases before 22.4R3-S7 and certain versions in the 23.x and 24.x release series, including Junos OS Evolved variants. The CVSS vector indicates local attack vector, low attack complexity, low privileges required, no user interaction, unchanged scope, and high impact on confidentiality, integrity, and availability.

Potential Impact

Successful exploitation results in a local low-privileged user gaining root privileges on the affected Junos OS device, leading to full system compromise. This can impact confidentiality, integrity, and availability of the device and its managed network functions. There are no reports of active exploitation in the wild at this time.

Mitigation Recommendations

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, avoid configurations that allow execution of unsigned Python operational scripts. Restrict local user access to trusted personnel only. Monitor Juniper Networks advisories for updates and apply patches promptly once released.

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Technical Details

Data Version
5.2
Assigner Short Name
juniper
Date Reserved
2026-03-23T19:46:13.672Z
Cvss Version
3.1
State
PUBLISHED
Remediation Level
null

Threat ID: 69d843751cc7ad14da3fb559

Added to database: 4/10/2026, 12:25:25 AM

Last enriched: 4/10/2026, 12:50:51 AM

Last updated: 4/10/2026, 7:24:27 AM

Views: 4

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