CVE-2026-33784: CWE-1393 Use of Default Password in Juniper Networks JSI LWC
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.
AI Analysis
Technical Summary
This vulnerability involves the use of a default password in Juniper Networks JSI vLWC software images. The initial password for a high privileged account is preset and not required to be changed during setup, enabling unauthorized full system access via network without authentication. The issue impacts all versions prior to 3.0.94 and is tracked as CWE-1393. The CVSS v3.1 base score is 9.8, indicating critical severity with network attack vector, no privileges required, no user interaction, and full confidentiality, integrity, and availability impact.
Potential Impact
An unauthenticated attacker can remotely gain full control over the affected vLWC device, compromising confidentiality, integrity, and availability. This could lead to complete system takeover, unauthorized data access, and disruption of device operations.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, it is recommended to manually change the default password immediately after provisioning to prevent unauthorized access. Monitor vendor communications for updates on patches or official mitigations.
CVE-2026-33784: CWE-1393 Use of Default Password in Juniper Networks JSI LWC
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.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability involves the use of a default password in Juniper Networks JSI vLWC software images. The initial password for a high privileged account is preset and not required to be changed during setup, enabling unauthorized full system access via network without authentication. The issue impacts all versions prior to 3.0.94 and is tracked as CWE-1393. The CVSS v3.1 base score is 9.8, indicating critical severity with network attack vector, no privileges required, no user interaction, and full confidentiality, integrity, and availability impact.
Potential Impact
An unauthenticated attacker can remotely gain full control over the affected vLWC device, compromising confidentiality, integrity, and availability. This could lead to complete system takeover, unauthorized data access, and disruption of device operations.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, it is recommended to manually change the default password immediately after provisioning to prevent unauthorized access. Monitor vendor communications for updates on patches or official mitigations.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- juniper
- Date Reserved
- 2026-03-23T19:46:13.670Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 69d822bd1cc7ad14da2ac974
Added to database: 4/9/2026, 10:05:49 PM
Last enriched: 4/9/2026, 10:21:16 PM
Last updated: 4/10/2026, 7:38:06 AM
Views: 23
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