An OS Command Injection vulnerability in the CLI processing of Juniper Networks Junos OS and Junos OS Evolved allows a local, high-privileged attacker executing specific, crafted CLI commands to inject arbitrary shell commands as root, leading to a complete compromise of the system.
Certain 'set system' commands, when executed with crafted arguments, are not properly sanitized, allowing for arbitrary shell injection. These shell commands are executed as root, potentially allowing for complete control of the vulnerable system.
This issue affects:
Junos OS:
* all versions before 22.4R3-S8,
* from 23.2 before 23.2R2-S5,
* from 23.4 before 23.4R2-S7,
* from 24.2 before 24.2R2-S2,
* from 24.4 before 24.4R2,
* from 25.2 before 25.2R2;
Junos OS Evolved:
* all versions before 22.4R3-S8-EVO,
* from 23.2 before 23.2R2-S5-EVO,
* from 23.4 before 23.4R2-S7-EVO,
* from 24.2 before 24.2R2-S2-EVO,
* from 24.4 before 24.4R2-EVO,
* from 25.2 before 25.2R1-S1-EVO, 25.2R2-EVO.
Metrics
Affected Vendors & Products
References
| Link | Providers |
|---|---|
| https://kb.juniper.net/JSA107875 |
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History
Mon, 13 Apr 2026 19:15:00 +0000
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| Metrics |
ssvc
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Fri, 10 Apr 2026 09:00:00 +0000
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Juniper Networks
Juniper Networks junos Os Juniper Networks junos Os Evolved |
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| Vendors & Products |
Juniper Networks
Juniper Networks junos Os Juniper Networks junos Os Evolved |
Thu, 09 Apr 2026 22:00:00 +0000
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| Description | An OS Command Injection vulnerability in the CLI processing of Juniper Networks Junos OS and Junos OS Evolved allows a local, high-privileged attacker executing specific, crafted CLI commands to inject arbitrary shell commands as root, leading to a complete compromise of the system. Certain 'set system' commands, when executed with crafted arguments, are not properly sanitized, allowing for arbitrary shell injection. These shell commands are executed as root, potentially allowing for complete control of the vulnerable system. This issue affects: Junos OS: * all versions before 22.4R3-S8, * from 23.2 before 23.2R2-S5, * from 23.4 before 23.4R2-S7, * from 24.2 before 24.2R2-S2, * from 24.4 before 24.4R2, * from 25.2 before 25.2R2; Junos OS Evolved: * all versions before 22.4R3-S8-EVO, * from 23.2 before 23.2R2-S5-EVO, * from 23.4 before 23.4R2-S7-EVO, * from 24.2 before 24.2R2-S2-EVO, * from 24.4 before 24.4R2-EVO, * from 25.2 before 25.2R1-S1-EVO, 25.2R2-EVO. | |
| Title | Junos OS and Junos OS Evolved: Execution of crafted CLI commands allows for arbitrary shell injection as root | |
| Weaknesses | CWE-78 | |
| References |
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| Metrics |
cvssV3_1
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Status: PUBLISHED
Assigner: juniper
Published: 2026-04-09T21:38:52.747Z
Updated: 2026-04-14T03:55:33.772Z
Reserved: 2026-03-23T19:46:13.672Z
Link: CVE-2026-33791
Updated: 2026-04-13T17:58:15.491Z
Status : Awaiting Analysis
Published: 2026-04-09T22:16:29.047
Modified: 2026-04-13T15:02:27.760
Link: CVE-2026-33791
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