Vulnerability-Lookup

GHSA-G6HM-R7F2-4J2F

Vulnerability from github – Published: 2026-04-10 00:30 – Updated: 2026-04-10 00:30

Details

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.

Severity

9.8 (Critical)


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

9.3 (Critical)


                  
                    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/AU:Y/R:U/RE:L

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-33784"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-1393"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-04-09T22:16:27Z",
    "severity": "CRITICAL"
  },
  "details": "A Use of Default Password vulnerability in the Juniper Networks \n\nSupport Insights (JSI) \n\nVirtual Lightweight Collector (vLWC) allows an unauthenticated, network-based attacker to take full control of the device.\n\nvLWC 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.",
  "id": "GHSA-g6hm-r7f2-4j2f",
  "modified": "2026-04-10T00:30:29Z",
  "published": "2026-04-10T00:30:29Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-33784"
    },
    {
      "type": "WEB",
      "url": "https://kb.juniper.net/JSA107871"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "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",
      "type": "CVSS_V4"
    }
  ]
}

CVE-2026-33784 (GCVE-0-2026-33784)

Vulnerability from cvelistv5 – Published: 2026-04-09 21:36 – Updated: 2026-04-13 18:06

Title

JSI Virtual Lightweight Collector: Default password is not required to be changed which allows unauthorized high-privileged access

Summary

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.

Severity

9.8 (Critical)


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

9.3 (Critical)


                        
                          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/AU:Y/R:U/RE:L

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-04-13 17:54 UTC

CWE

CWE-1393 - Use of Default Password

Assigner

juniper mitre root

References

1 reference

URL	Tags
https://kb.juniper.net/JSA107871	vendor-advisory

Impacted products

1 product

Vendor	Product	Version
Juniper Networks	JSI LWC	Affected: 0 , < 3.0.94 (semver)

Date Public

2026-04-08 16:00

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-33784",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-04-13T17:54:25.395838Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-04-13T18:06:19.017Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "platforms": [
            "vLWC"
          ],
          "product": "JSI LWC",
          "vendor": "Juniper Networks",
          "versions": [
            {
              "lessThan": "3.0.94",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "datePublic": "2026-04-08T16:00:00.000Z",
      "descriptions": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "A Use of Default Password vulnerability in the Juniper Networks \n\nSupport Insights (JSI) \n\nVirtual Lightweight Collector (vLWC) allows an unauthenticated, network-based attacker to take full control of the device.\u003cbr\u003e\u003cbr\u003evLWC 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.\u003cp\u003eThis issue affects all versions of vLWC before 3.0.94.\u003c/p\u003e"
            }
          ],
          "value": "A Use of Default Password vulnerability in the Juniper Networks \n\nSupport Insights (JSI) \n\nVirtual Lightweight Collector (vLWC) allows an unauthenticated, network-based attacker to take full control of the device.\n\nvLWC 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."
        }
      ],
      "exploits": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "Juniper SIRT is not aware of any malicious exploitation of this vulnerability."
            }
          ],
          "value": "Juniper SIRT is not aware of any malicious exploitation of this vulnerability."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 9.8,
            "baseSeverity": "CRITICAL",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ]
        },
        {
          "cvssV4_0": {
            "Automatable": "YES",
            "Recovery": "USER",
            "Safety": "NOT_DEFINED",
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "attackVector": "NETWORK",
            "baseScore": 9.3,
            "baseSeverity": "CRITICAL",
            "privilegesRequired": "NONE",
            "providerUrgency": "NOT_DEFINED",
            "subAvailabilityImpact": "LOW",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "NONE",
            "valueDensity": "NOT_DEFINED",
            "vectorString": "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/AU:Y/R:U/RE:L",
            "version": "4.0",
            "vulnAvailabilityImpact": "HIGH",
            "vulnConfidentialityImpact": "HIGH",
            "vulnIntegrityImpact": "HIGH",
            "vulnerabilityResponseEffort": "LOW"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-1393",
              "description": "CWE-1393 Use of Default Password",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-04-09T21:36:37.519Z",
        "orgId": "8cbe9d5a-a066-4c94-8978-4b15efeae968",
        "shortName": "juniper"
      },
      "references": [
        {
          "tags": [
            "vendor-advisory"
          ],
          "url": "https://kb.juniper.net/JSA107871"
        }
      ],
      "solutions": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "The following software releases have been updated to resolve this specific issue: 3.0.94, and all subsequent releases.\u003cbr\u003e"
            }
          ],
          "value": "The following software releases have been updated to resolve this specific issue: 3.0.94, and all subsequent releases."
        }
      ],
      "source": {
        "advisory": "JSA107871",
        "defect": [
          "JDEF-1032"
        ],
        "discovery": "INTERNAL"
      },
      "title": "JSI Virtual Lightweight Collector: Default password is not required to be changed which allows unauthorized high-privileged access",
      "workarounds": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "The password can be changed in the setup menu of the device, which is described at\u0026nbsp;\u003ca target=\"_blank\" rel=\"nofollow\" href=\"https://www.juniper.net/documentation/us/en/software/jsi/vlwc-deploy/topics/topic-map/configure-settings-jsi-shell.html\"\u003eConfigure Network Settings through JSI Shell | Juniper Support Insights | Juniper Networks\u003c/a\u003e"
            }
          ],
          "value": "The password can be changed in the setup menu of the device, which is described at\u00a0 Configure Network Settings through JSI Shell | Juniper Support Insights | Juniper Networks https://www.juniper.net/documentation/us/en/software/jsi/vlwc-deploy/topics/topic-map/configure-settings-jsi-shell.html"
        }
      ],
      "x_generator": {
        "engine": "Vulnogram 0.1.0-dev"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "8cbe9d5a-a066-4c94-8978-4b15efeae968",
    "assignerShortName": "juniper",
    "cveId": "CVE-2026-33784",
    "datePublished": "2026-04-09T21:36:37.519Z",
    "dateReserved": "2026-03-23T19:46:13.670Z",
    "dateUpdated": "2026-04-13T18:06:19.017Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

GHSA-G6HM-R7F2-4J2F

CVE-2026-33784 (GCVE-0-2026-33784)

Tags

Sightings

Nomenclature

Related by attack behaviour