Auth bypass in Juniper Ex2300
CVE-2026-33802
A Missing Authorization vulnerability in the CLI of Juniper Networks Junos OS on EX Series allows a local, authenticated attacker to cause a Denial-of-Service (DoS). On EX2300, EX4000, EX4100, EX4300-MP (Multigigabit) and EX4400 switches, an authenticated, local attacker with no specific permissions or class can execute a specific, privileged CLI 'request' command which will cause complete traffic impact until the system automatically recovers. This issue affects Junos OS on EX2300, EX4000, EX4100, EX4300-MP (Multigigabit) and EX4400: * 23.2R2 versions before 23.2R2-S6, * 23.4 versions before 23.4R2-S8, * 24.2 versions before 24.2R2-S4, * 24.4 versions before 24.4R2-S3, * 25.2 versions before 25.2R2, * 25.4 versions before 25.4R1-S1.
Vulnerability class: Broken Access Control
EPSS: 0.001 (0.6th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
Affected products
- Juniper Ex2300
- Juniper Ex4000
- Juniper Ex4100
- Juniper Ex4300-mp
- Juniper Ex4400
- Juniper Junos — versions 23.2, 23.4, 24.2
- Juniper Networks Junos Os — versions 23.2R2, 23.4, 24.2
Weakness classification (CWE)
References
- sirt@juniper.net (vendor-advisory, Vendor Advisory)
Frequently asked questions
- What is CVE-2026-33802?
- CVE-2026-33802 is a medium-severity vulnerability in Juniper Ex2300, classified under Missing Authorization. CVSS score: 5.5/10. Published 2026-07-09.
- How severe is CVE-2026-33802?
- Medium severity. CVSS v3 base score is 5.5 out of 10.