CVE-2026-33784

Q: How do I fix CVE-2026-33784?

Upgrade virtual lightweight collector to 3.0.94 or later.

Q: Is CVE-2026-33784 being actively exploited?

Not that we know of. CVE-2026-33784 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 0.46% is the estimated probability that it will be exploited in the next 30 days. That is higher than 37% of all scored CVEs.

Q: How severe is CVE-2026-33784?

CVE-2026-33784 has a CVSS v3 base score of 9.8, rated critical. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.

Q: What does CVE-2026-33784 affect?

Published advisories record a fix for virtual lightweight collector (NVD). Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.

CRITICAL

9.8

CVSS v3

NVD

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.

CWE-1393

How to fix

Remediation Available

virtual lightweight collectorNVD

Affected:< 3.0.94Fixed in:3.0.94CVE-2026-33784derived from NVD

TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Exploit Intelligence

0.46%probability of exploitation in 30 days

37thpercentile

Low risk: more likely to be exploited than 37% of all known CVEs.

References

Vendor Advisory1

kb.juniper.net

Related Vulnerabilities

Other CWE-1393 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2023-45249	Critical	9.8	53%	KEV	Fix
CVE-2024-29021	Critical	9.0	20%	-	-
CVE-2025-26793	Unscored	-	2.3%	-	-
CVE-2024-48987	Medium	6.6	1.0%	-	Fix
CVE-2026-2635	High	7.3	1.0%	-	-
CVE-2023-25131	Critical	9.4	1.0%	-	-

Common questions

How do I fix CVE-2026-33784?

Upgrade virtual lightweight collector to 3.0.94 or later.

Is CVE-2026-33784 being actively exploited?

Not that we know of. CVE-2026-33784 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 0.46% is the estimated probability that it will be exploited in the next 30 days. That is higher than 37% of all scored CVEs.

How severe is CVE-2026-33784?

CVE-2026-33784 has a CVSS v3 base score of 9.8, rated critical. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.

What does CVE-2026-33784 affect?

Published advisories record a fix for virtual lightweight collector (NVD). Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.

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Markdown

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-07-08.