CVE-2026-21915 MEDIUM

CVE-2026-21915: JSI Virtual Lightweight Collector: Shell escape allows privilege escalation to root

Vendor Juniper Networks
Product JSI LWC
Weakness CWE-183
Published April 9, 2026
Last update April 13, 2026
View on NVD All CVEs

CVSS base score

6.7/10
Attack vector Local
Attack complexity Low
Privileges required High
User interaction None
Confidentiality High
Integrity High

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

April 9, 2026 CVE published
April 13, 2026 Record updated