CVE-2026-21915
6.7 · MEDIUMOverview
CVE-2026-21915 is a medium-severity vulnerability affecting juniper virtual_lightweight_collector. It was published on April 9, 2026 and has a CVSS 3.1 base score of 6.7 (MEDIUM).
This vulnerability has a CVSS 3.1 base score of 6.7, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.
Technical 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.
Remediation
Check the references section for vendor advisories and patches from juniper. Update virtual_lightweight_collector to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| juniper | virtual_lightweight_collector | >= 0, < 3.0.94 | Affected |
References
Frequently Asked Questions
What is CVE-2026-21915?
CVE-2026-21915 is a medium-severity vulnerability affecting juniper virtual_lightweight_collector. It was published on April 9, 2026 and has a CVSS 3.1 base score of 6.7 (MEDIUM).
How severe is CVE-2026-21915?
This vulnerability has a CVSS 3.1 base score of 6.7, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.
How do I fix or remediate CVE-2026-21915?
Check the references section for vendor advisories and patches from juniper. Update virtual_lightweight_collector to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2026-21915?
CyberStrike's AI-powered security agents can automatically detect CVE-2026-21915 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
AI agents map your attack surface to find vulnerabilities like this one.
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