OS Command Injection Vulnerability in Juniper Networks Junos OS
CVE-2026-33791

8.4HIGH

Key Information:

Vendor

Juniper Networks
Status
Junos Os
Junos Os Evolved
Vendor
CVE Published:
9 April 2026

Badges

👾 Exploit Exists

What is CVE-2026-33791?

An OS Command Injection vulnerability exists in the CLI processing of Juniper Networks' Junos OS and Junos OS Evolved. This flaw enables a local attacker with high privileges to execute crafted CLI commands, compromising the system by injecting arbitrary shell commands that run with root privileges. Specific 'set system' commands fail to properly sanitize their arguments, leading to a critical oversight that can result in complete control over the affected system.

Affected Version(s)

Junos OS 0 < 22.4R3-S8

Junos OS 23.2 < 23.2R2-S5

Junos OS 23.4 < 23.4R2-S7

References

https://kb.juniper.net/JSA107875
vendor-advisory

CVSS V4

Score:
8.4
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Local
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

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