CVE-2026-21915CWE-183

JSI Virtual Lightweight Collector: Shell escape allows privilege escalation to root

High · published April 9, 2026

CVSS v4.0
8.4
EPSS
2%
Percentile
82.7
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v4.0
8.4 · HIGH
Vector
CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/R:U/RE:M
EPSS
0.02240 · 82.7th percentile
Weakness
CWE-183 · Permissive List of Allowed Inputs
Published
2026-04-09T21:26Z
EPSS history
Timeline
  • 09 APR 21:26Z
    JSI Virtual Lightweight Collector: Shell escape allows privilege escalation to root
    cvelistv5