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Advisory severityMedium6.7Juniper Networks

Medium [CVE-2026-33791] 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

This medium-severity Juniper Networks advisory covers CVE-2026-33791; related products: Junos OS, Junos OS Evolved, Junos.

Aggregated and source-linked by VulniPulse. Data sources, validation and limitations.

CVE-2026-33791 Source published Source updated

VulniPulse record published Record updated

CVE-2026-33791
Related products & platforms
Juniper NetworksJunosJunos OS Evolved
Open source advisory

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Summary

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:

  • all versions before 22.4R3-S8,
  • from 23.2 before 23.2R2-S5,
  • from 23.4 before 23.4R2-S7,
Affected versions
  • 23.2
  • 23.4
  • 24.2
  • 24.4
  • 25.2

Official advisory · high-confidence parse· fetched 4 months ago·verify at source

Fixed versions
  • 22.4R3-S8
  • 23.2R2-S5
  • 23.4R2-S7
  • 24.2R2-S2
  • 24.4R2
  • 25.2R2
  • 22.4R3-S8-EVO
  • 23.2R2-S5-EVO
  • 23.4R2-S7-EVO
  • 24.2R2-S2-EVO
  • 24.4R2-EVO
  • 25.2R1-S1-EVO

Official advisory · high-confidence parse· fetched 4 months ago·verify at source

Mitigation

Upgrade to a fixed release: 22.4R3-S8, 23.2R2-S5, 23.4R2-S7, 24.2R2-S2, 24.4R2, 25.2R2. That is the remediation for this advisory.

The vendor advisory may list additional interim mitigations or workarounds not captured here — review it before change work.

Official advisory · high-confidence parse· fetched 4 months ago·verify at source

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