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.
References
| Link | Resource |
|---|---|
| https://kb.juniper.net/JSA107875 | Mitigation Vendor Advisory |
| https://supportportal.juniper.net/JSA107875 |
Configurations
Configuration 1 (hide)
|
Configuration 2 (hide)
|
History
26 Oct 2026, 22:10
| Type | Values Removed | Values Added |
|---|---|---|
| Summary |
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Information
Published : 2026-04-09 22:16
Updated : 2026-10-26 22:10
NVD link : CVE-2026-33791
Mitre link : CVE-2026-33791
CVE.ORG link : CVE-2026-33791
JSON object : View
Products Affected
juniper
- junos
- junos_os_evolved
CWE
CWE-78
Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')