CVE-2026-33802: Junos OS: EX Series: Unauthorized users can execute service-impacting CLI command
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.
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
Junos OS (EX Series)to a version that resolves this vulnerability.Fixed in 23.2R2-S6 - Upgrade
Upgrade
Junos OS (EX Series)to a version that resolves this vulnerability.Fixed in 23.4R2-S8 - Upgrade
Upgrade
Junos OS (EX Series)to a version that resolves this vulnerability.Fixed in 24.2R2-S4 - Upgrade
Upgrade
Junos OS (EX Series)to a version that resolves this vulnerability.Fixed in 24.4R2-S3 - Upgrade
Upgrade
Junos OS (EX Series)to a version that resolves this vulnerability.Fixed in 25.2R2 - Upgrade
Upgrade
Junos OS (EX Series)to a version that resolves this vulnerability.Fixed in 25.4R1-S1 - Compensating control
For EX2300, EX4000, EX4100, EX4300-MP (Multigigabit), and EX4400, limit local authenticated CLI access so that unauthorized users cannot execute the specific privileged CLI 'request' command that can cause complete traffic impact until automatic recovery.
Event History
Frequently Asked Questions
What is the severity of CVE-2026-33802?
The severity of CVE-2026-33802 is medium with a CVSS score of 6.8.
How do I fix CVE-2026-33802?
To fix CVE-2026-33802, apply the latest patch or update from Juniper Networks for your Junos OS version.
What impact does CVE-2026-33802 have on my network devices?
CVE-2026-33802 can allow an authenticated local attacker to execute service-impacting CLI commands, potentially causing a Denial-of-Service.
Which devices are affected by CVE-2026-33802?
The vulnerability affects Juniper Networks EX Series switches, including EX2300, EX4000, EX4100, EX4300-MP, and EX4400.
Is CVE-2026-33802 a remote attack vulnerability?
No, CVE-2026-33802 requires local access, meaning the attacker must be physically present or have local network access.