Juniper Networks Junos OS up to 24.4R2-S3/25.2R2-S0/25.4R1-S2 CLI os command injection

Summaryinfo

A vulnerability, which was classified as very critical, was found in Juniper Networks Junos OS up to 24.4R2-S3/25.2R2-S0/25.4R1-S2. The impacted element is an unknown function of the component CLI. Such manipulation leads to os command injection. This vulnerability is documented as CVE-2026-102079. The attack needs to be performed locally. There is not any exploit available. You should upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as very critical, has been found in Juniper Networks Junos OS up to 24.4R2-S3/25.2R2-S0/25.4R1-S2. Affected by this issue is some unknown functionality of the component CLI. The manipulation with an unknown input leads to a os command injection vulnerability. Using CWE to declare the problem leads to CWE-78. The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component. Impacted is confidentiality, integrity, and availability. CVE summarizes:

An OS command injection vulnerability in the CLI of Juniper Networks Junos OS allows a local, low privileged attacker to take complete control of the device. A specific 'request csds' command doesn't sanitize user provided input so that it can be interpreted as a command. This allows unintended command execution with root privileges, which can lead to unauthorized system access or modification. This issue affects Junos OS: * 24.4 versions before 24.4R2-S4; * 25.2 versions before 25.2R2-S1; * 25.4 versions before 25.4R1-S3; This issue does not affect Junos OS releases before 24.4R1.

The advisory is available at supportportal.juniper.net. This vulnerability is handled as CVE-2026-102079 since 09/28/2026. The exploitation is known to be easy. Local access is required to approach this attack. The technical details are unknown and an exploit is not available. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 10/14/2026). This vulnerability is assigned to T1202 by the MITRE ATT&CK project.

Upgrading to version 24.4R2-S4, 25.2R2-S1 or 25.4R1-S3 eliminates this vulnerability.

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Productinfo

Type

• Router Operating System

Vendor

• Juniper Networks

Name

• Junos OS

Version

• 24.4R2-S3
• 25.2R2-S0
• 25.4R1-S2

License

• commercial

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