CVE-2026-33784

critical · 9.3

A Use of Default Password vulnerability in the Juniper Networks Support Insights (JSI) Virtual Lightweight Collector (vLWC) allows an unauthenticated, network-based attacker to take full control of the device. vLWC software images ship with an initial password for a high privileged account. A change of this password is not enforced during the provisioning of the software, which can make full access to the system by unauthorized actors possible.This issue affects all versions of vLWC before 3.0.94.

9.3

CVSS

0.5%

EPSS (exploit prob.)

39th

EPSS percentile

2026-04-09

Published

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:L/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:Y/R:U/V:X/RE:L/U:X

Weaknesses

CWE-1393

Affected products

Vendor	Product	Affected versions
juniper	virtual_lightweight_collector	< 3.0.94

Check a specific version with /api/v1/cve/match.

References

https://kb.juniper.net/JSA107871

Query this programmatically:

curl https://evil-db.io/api/v1/cve/CVE-2026-33784