CVE-2026-21915

A Permissive List of Allowed Input vulnerability in the CLI of Juniper Networks Support Insights (JSI) Virtual Lightweight Collector (vLWC) allows a local, high privileged attacker to escalate their privileges to root. The CLI menu accepts input without carefully validating it, which allows for shell command injection. These shell commands are executed with root permissions and can be used to gain complete control of the system. This issue affects all JSI vLWC versions before 3.0.94.

CVSS v3 6.7 MEDIUM

6.7^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 0.8 / Impact : 5.9

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required HIGH

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://kb.juniper.net/JSA106016	Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:juniper:virtual_lightweight_collector:*:*:*:*:*:*:*:*

History

08 Jul 2026, 03:19

Type	Values Removed	Values Added
References	~~() https://kb.juniper.net/JSA106016 -~~	() https://kb.juniper.net/JSA106016 - Vendor Advisory
CWE		CWE-78
CPE		cpe:2.3:a:juniper:virtual_lightweight_collector::::::::
First Time		Juniper Juniper virtual Lightweight Collector

09 Apr 2026, 22:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-04-09 22:16

Updated : 2026-07-08 03:19

NVD link : CVE-2026-21915

Mitre link : CVE-2026-21915

CVE.ORG link : CVE-2026-21915

JSON object : View

Products Affected

juniper

virtual_lightweight_collector

CWE

CWE-183

Permissive List of Allowed Inputs

CWE-78

Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

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