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.
Published: 2026-04-09
Score: 8.4 High
EPSS: < 1% Very Low
KEV: No
Impact: Privilege Escalation to root
Action: Immediate Patch
AI Analysis

Impact

The vulnerability in the Juniper Networks Support Insights Virtual Lightweight Collector CLI allows a local high privileged attacker to run arbitrary shell commands with root permissions. This shell command injection leads to full control of the system, compromising confidentiality, integrity, and availability. The weakness is an improper restriction of operations within a command, as identified by CWE‑183.

Affected Systems

Juniper Networks JSI Virtual Lightweight Collector (vLWC) is affected. All versions earlier than 3.0.94 are vulnerable; subsequent releases have been updated to fix the issue.

Risk and Exploitability

The CVSS score of 8.4 indicates high severity. The EPSS score is not available and the vulnerability is not listed in the CISA KEV catalog. Attackers need local, high‑privilege access and can exploit the vulnerability through the CLI, sending crafted input that is executed with root privileges. The attack vector is inferred to be local due to the requirement for CLI access.

Generated by OpenCVE AI on April 9, 2026 at 22:27 UTC.

Remediation

Vendor Solution

The following software releases have been updated to resolve this specific issue: 3.0.94, and all subsequent releases.

Vendor Workaround

Use access lists or firewall filters to limit access to the CLI only from trusted hosts and administrators.

OpenCVE Recommended Actions

  • Apply Juniper Software release 3.0.94 or later to eliminate the vulnerability.
  • If patching is delayed, restrict CLI access using access lists or firewall filters to allow only trusted hosts and administrators.
  • Continuously monitor for unauthorized CLI activity or modifications to system binaries.

Generated by OpenCVE AI on April 9, 2026 at 22:27 UTC.

Tracking

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Advisories

No advisories yet.

References
Link Providers
https://kb.juniper.net/JSA106016 cve-icon cve-icon
History

Mon, 13 Apr 2026 13:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Fri, 10 Apr 2026 09:00:00 +0000

Type Values Removed Values Added
First Time appeared Juniper Networks
Juniper Networks jsi Lwc
Vendors & Products Juniper Networks
Juniper Networks jsi Lwc

Thu, 09 Apr 2026 21:45:00 +0000

Type Values Removed Values Added
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.
Title JSI Virtual Lightweight Collector: Shell escape allows privilege escalation to root
Weaknesses CWE-183
References
Metrics cvssV3_1

{'score': 6.7, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H'}

cvssV4_0

{'score': 8.4, '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'}

Subscriptions

Juniper Networks Jsi Lwc
cve-icon MITRE

Status: PUBLISHED

Assigner: juniper

Published:

Updated: 2026-04-13T13:04:16.101Z

Reserved: 2026-01-05T17:32:48.711Z

Link: CVE-2026-21915

cve-icon Vulnrichment

Updated: 2026-04-13T13:00:19.315Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-04-09T22:16:24.747

Modified: 2026-04-13T15:02:27.760

Link: CVE-2026-21915

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-04-10T09:28:46Z

Weaknesses