Disclosure
Junos OS and Junos OS Evolved: When an unsigned Python op script configuration is present, a local low privileged user can compromise the system
CVE: CVE-2026-33793
PT ID: PT-2026-31754
Vendor: Juniper networks
Product: Junos OS
CVSS: 7.8
Credits: n/a
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.
References:
• https://dbugs.ptsecurity.com/vulnerability/CVE-2026-33793
• https://kb.juniper.net/JSA103142
#dbugs_vuln
Post summary
The text announces CVE‑2026‑33793, detailing a privilege escalation flaw in Junos OS via unsigned Python scripts, and cites a vendor KB for potential patching, but does not mention exploits or active attacks.
