CVE-2026-21915
Medium
Description
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.
SeverityMedium
CVSS6.7
Exploit probability—
Product
Juniper Virtual Lightweight Collector
PublishedApr 9, 2026
First seenApr 9, 2026
Weakness typeCWE-183CWE-183
How to fix
Update
- juniper virtual_lightweight_collector3.0.94 or later
Vendor advisories
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| juniper virtual_lightweight_collector | v < 3.0.94 | 3.0.94 |
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