# CVE-2026-33791: An OS Command Injection vulnerability in the CLI processing of Juniper Networks Junos OS and Junos OS Evolved allows a…

Source: https://junglewise.ai/threats/cve-2026-33791-an-os-command-injection-vulnerability-in-the-cli-processing-of  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-04-09  
License: CC BY 4.0 with a link back

CVE-2026-33791 · Severity: medium · CVSS 6.7 · Published 2026-04-09

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.

Technologies: [Juniper Junos](https://junglewise.ai/threats/technologies/junos), [Juniper Junos Os Evolved](https://junglewise.ai/threats/technologies/juniper-junos-os-evolved). Vendors: [Juniper](https://junglewise.ai/threats/vendors/juniper).

## Quick answers

**Is CVE-2026-33791 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-33791 being exploited in the wild.

**How severe is CVE-2026-33791?** Medium severity, with a CVSS score of 6.7, published 9 April 2026.

**Which products and versions are affected?** Juniper Junos, Juniper Junos Os Evolved. The advisory does not name versions.

**Is there a fix for CVE-2026-33791?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**Am I affected by CVE-2026-33791?** Check whether you run Juniper Junos or Juniper Junos Os Evolved. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Affected products

- Juniper Junos
- Juniper Junos Os Evolved

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