CVE-2026-21915 | THREATINT

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 Reserved 2026-01-05 | Published 2026-04-09 | Updated 2026-04-13 | Assigner juniper

MEDIUM: 6.7CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

HIGH: 8.4CVSS: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

Problem types

CWE-183 Permissive List of Allowed Input

Product status

Default status

unaffected

Any version before 3.0.94

affected

References

kb.juniper.net/JSA106016 vendor-advisory

cve.org (CVE-2026-21915)

nvd.nist.gov (CVE-2026-21915)

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