CVE-2026-33784 Hardcoded credentials in JSI LWC
An unauthenticated attacker can gain full control of Juniper JSI Virtual Lightweight Collector devices using the default high-privileged password.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-33784?
CVE-2026-33784 is a critical vulnerability in Juniper Networks JSI LWC, published on 9 Apr 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
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.
Weakness: CWE-1393
Which versions are affected by CVE-2026-33784?
It affects 1 product.
Products include Juniper Virtual Lightweight Collector.
How do I fix CVE-2026-33784?
No fix has been published for CVE-2026-33784 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-33784 being exploited?
There is no known exploitation of CVE-2026-33784 in the wild and no public exploit code.
Other vulnerabilities in Juniper Networks JSI LWC
Sources
Also known as GHSA-g6hm-r7f2-4j2f.