What is CVE-2026-33784?

CVE-2026-33784 is a critical-severity vulnerability in Juniper Virtual Lightweight Collector, classified under CWE-1393. CVSS score: 9.8/10. Published 2026-04-09.

How severe is CVE-2026-33784?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Vulnerability in Juniper Virtual Lightweight Collector

CVE-2026-33784

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.

EPSS: 0.005 (38.0th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Juniper Virtual_lightweight_collector
Juniper Networks Jsi Lwc — versions 0

Weakness classification (CWE)

CWE-1393

References

sirt@juniper.net (vendor-advisory, Vendor Advisory)

Frequently asked questions

What is CVE-2026-33784?: CVE-2026-33784 is a critical-severity vulnerability in Juniper Virtual Lightweight Collector, classified under CWE-1393. CVSS score: 9.8/10. Published 2026-04-09.
How severe is CVE-2026-33784?: Critical severity. CVSS v3 base score is 9.8 out of 10.