Vulnerability in Juniper Junos
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, 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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.002 (5.6th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 6th percentile — 5.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: 0.000
Affected products
- Juniper Junos — versions 22.4, 23.2, 23.4
- Juniper Junos OS Evolved — versions 22.4, 23.2, 23.4
- Juniper Networks Junos OS — versions 0, 23.2, 23.4
- Juniper Networks Junos OS Evolved — versions 0, 23.2, 23.4
Weakness classification (CWE)
References
- supportportal.juniper.net/JSA103142 (vendor-advisory, Mitigation, Vendor Advisory)
Frequently asked questions
- What is CVE-2026-33793?
- CVE-2026-33793 is a high-severity vulnerability in Juniper Junos, classified under CWE-250. CVSS score: 7.8/10. Published 2026-04-09.
- How severe is CVE-2026-33793?
- High severity. CVSS v3 base score is 7.8 out of 10.