Vulnerability-Lookup

CVE-2021-20999 (GCVE-0-2021-20999)

Vulnerability from cvelistv5 – Published: 2021-05-13 13:45 – Updated: 2024-09-17 01:16

Title

WEIDMUELLER: Accidentally open network port in u-controls and IoT-Gateways

Summary

In Weidmüller u-controls and IoT-Gateways in versions up to 1.12.1 a network port intended only for device-internal usage is accidentally accessible via external network interfaces. By exploiting this vulnerability the device may be manipulated or the operation may be stopped.

Severity

9.4 (Critical)


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

CWE

CWE-668 - Exposure of Resource to Wrong Sphere

Assigner

CERTVDE CNA under the icscert root

CNA scorecard B 76/100 over 151 records in the last 180 days details

References

1 reference

URL	Tags
https://cert.vde.com/en-us/advisories/vde-2021-016	x_refsource_CONFIRM

Impacted products

4 products

Vendor	Product	Version	CPE status
Weidmüller	UC20-WL2000-AC (No. 1334950000)	Affected: 1.3.0 , ≤ 1.9.0 (custom) Affected: 1.10.0 , ≤ 1.10.2 (custom) Affected: 1.11.0 , ≤ 1.12.1 (custom)	guessed
Weidmüller	UC20-WL2000-IOT (No. 1334990000)	Affected: 1.3.0 , ≤ 1.9.0 (custom) Affected: 1.10.0 , ≤ 1.10.2 (custom) Affected: 1.11.0 , ≤ 1.12.1 (custom)	guessed
Weidmüller	IOT-GW30 (No. 2682620000)	Affected: 1.3.0 , ≤ 1.9.0 (custom) Affected: 1.10.0 , ≤ 1.10.2 (custom) Affected: 1.11.0 , ≤ 1.12.1 (custom)	guessed
Weidmüller	IOT-GW30-4G-EU (No. 2682630000)	Affected: 1.3.0 , ≤ 1.9.0 (custom) Affected: 1.10.0 , ≤ 1.10.2 (custom) Affected: 1.11.0 , ≤ 1.12.1 (custom)	guessed

Date Public

2021-05-04 00:00

Credits

Reported by Weidmüller.

Show details on NVD website

JSON

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                "baseSeverity": "CRITICAL",
                "confidentialityImpact": "LOW",
                "integrityImpact": "HIGH",
                "privilegesRequired": "NONE",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:H",
                "version": "3.1"
              },
              "exploitabilityScore": 3.9,
              "impactScore": 5.5,
              "source": "info@cert.vde.com",
              "type": "Secondary"
            },
            {
              "cvssData": {
                "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"
              },
              "exploitabilityScore": 3.9,
              "impactScore": 5.9,
              "source": "nvd@nist.gov",
              "type": "Primary"
            }
          ]
        },
        "published": "2021-05-13T14:15:18.150",
        "references": [
          {
            "source": "info@cert.vde.com",
            "tags": [
              "Third Party Advisory"
            ],
            "url": "https://cert.vde.com/en-us/advisories/vde-2021-016"
          },
          {
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            "tags": [
              "Third Party Advisory"
            ],
            "url": "https://cert.vde.com/en-us/advisories/vde-2021-016"
          }
        ],
        "sourceIdentifier": "info@cert.vde.com",
        "vulnStatus": "Modified",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-668"
              }
            ],
            "source": "info@cert.vde.com",
            "type": "Secondary"
          },
          {
            "description": [
              {
                "lang": "en",
                "value": "NVD-CWE-Other"
              }
            ],
            "source": "nvd@nist.gov",
            "type": "Primary"
          }
        ]
      }
    },
    "redhat_vex": {
      "current_release_date": "2026-03-27T14:59:11+00:00",
      "cve": "CVE-2021-20999",
      "id": "CVE-2021-20999",
      "initial_release_date": "2021-05-04T00:00:00+00:00",
      "product_status:known_not_affected": "1",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "WEIDMUELLER: Accidentally open network port in u-controls and IoT-Gateways",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2021/cve-2021-20999.json",
      "version": "3"
    }
  }
}

FKIE_CVE-2021-20999

Vulnerability from fkie_nvd - Published: 2021-05-13 14:15 - Updated: 2026-06-17 03:34

Severity

9.4 (Critical) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:H
9.8 (Critical) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Summary

References

	URL	Tags
	info@cert.vde.com	https://cert.vde.com/en-us/advisories/vde-2021-016	Third Party Advisory
	af854a3a-2127-422b-91ae-364da2661108	https://cert.vde.com/en-us/advisories/vde-2021-016	Third Party Advisory

Impacted products

Vendor	Product	Version
weidmueller	uc20-wl2000-ac_firmware	*
weidmueller	uc20-wl2000-ac_firmware	*
weidmueller	uc20-wl2000-ac_firmware	1.11.0
weidmueller	uc20-wl2000-ac_firmware	1.12.1
weidmueller	uc20-wl2000-ac	-
weidmueller	uc20-wl2000-iot_firmware	*
weidmueller	uc20-wl2000-iot_firmware	*
weidmueller	uc20-wl2000-iot_firmware	1.11.0
weidmueller	uc20-wl2000-iot_firmware	1.12.1
weidmueller	uc20-wl2000-iot	-
weidmueller	iot-gw30_firmware	*
weidmueller	iot-gw30_firmware	*
weidmueller	iot-gw30_firmware	1.11.0
weidmueller	iot-gw30_firmware	1.12.1
weidmueller	iot-gw30	-
weidmueller	iot-gw30-4g-eu_firmware	*
weidmueller	iot-gw30-4g-eu_firmware	*
weidmueller	iot-gw30-4g-eu_firmware	1.11.0
weidmueller	iot-gw30-4g-eu_firmware	1.12.1
weidmueller	iot-gw30-4g-eu	-

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "UC20-WL2000-AC (No. 1334950000)",
          "vendor": "Weidm\u00fcller",
          "versions": [
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        },
        {
          "product": "IOT-GW30 (No. 2682620000)",
          "vendor": "Weidm\u00fcller",
          "versions": [
            {
              "lessThanOrEqual": "1.9.0",
              "status": "affected",
              "version": "1.3.0",
              "versionType": "custom"
            },
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              "lessThanOrEqual": "1.10.2",
              "status": "affected",
              "version": "1.10.0",
              "versionType": "custom"
            },
            {
              "lessThanOrEqual": "1.12.1",
              "status": "affected",
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              "versionType": "custom"
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          ]
        },
        {
          "product": "IOT-GW30-4G-EU (No. 2682630000)",
          "vendor": "Weidm\u00fcller",
          "versions": [
            {
              "lessThanOrEqual": "1.9.0",
              "status": "affected",
              "version": "1.3.0",
              "versionType": "custom"
            },
            {
              "lessThanOrEqual": "1.10.2",
              "status": "affected",
              "version": "1.10.0",
              "versionType": "custom"
            },
            {
              "lessThanOrEqual": "1.12.1",
              "status": "affected",
              "version": "1.11.0",
              "versionType": "custom"
            }
          ]
        }
      ],
      "source": "info@cert.vde.com"
    }
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  "cveTags": [],
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      "lang": "en",
      "value": "In Weidm\u00fcller u-controls and IoT-Gateways in versions up to 1.12.1 a network port intended only for device-internal usage is accidentally accessible via external network interfaces. By exploiting this vulnerability the device may be manipulated or the operation may be stopped."
    },
    {
      "lang": "es",
      "value": "En Weidm\u00fcller u-controls and IoT-Gateway en versiones hasta 1.12.1, se puede acceder accidentalmente a un puerto de red destinado \u00fanicamente para uso interno del dispositivo por medio de interfaces de red externas.\u0026#xa0;Al explotar esta vulnerabilidad, el dispositivo puede ser manipulado o la operaci\u00f3n puede ser detenida"
    }
  ],
  "id": "CVE-2021-20999",
  "lastModified": "2026-06-17T03:34:37.780",
  "metrics": {
    "cvssMetricV2": [
      {
        "acInsufInfo": false,
        "baseSeverity": "HIGH",
        "cvssData": {
          "accessComplexity": "LOW",
          "accessVector": "NETWORK",
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        },
        "exploitabilityScore": 10.0,
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        "obtainAllPrivilege": false,
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        "source": "info@cert.vde.com",
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          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
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        },
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  },
  "published": "2021-05-13T14:15:18.150",
  "references": [
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      "source": "info@cert.vde.com",
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        "Third Party Advisory"
      ],
      "url": "https://cert.vde.com/en-us/advisories/vde-2021-016"
    },
    {
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      ],
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    }
  ],
  "sourceIdentifier": "info@cert.vde.com",
  "vulnStatus": "Modified",
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    },
    {
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        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}

GHSA-3QPH-F3MQ-792V

Vulnerability from github – Published: 2022-05-24 22:28 – Updated: 2022-10-22 12:00

Details

In WeidmÃ¼ller u-controls and IoT-Gateways in versions up to 1.12.1 a network port intended only for device-internal usage is accidentally accessible via external network interfaces. By exploiting this vulnerability the device may be manipulated or the operation may be stopped.

Severity

9.8 (Critical)


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

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2021-20999"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-668"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2021-05-13T14:15:00Z",
    "severity": "CRITICAL"
  },
  "details": "In Weidm\u00c3\u00bcller u-controls and IoT-Gateways in versions up to 1.12.1 a network port intended only for device-internal usage is accidentally accessible via external network interfaces. By exploiting this vulnerability the device may be manipulated or the operation may be stopped.",
  "id": "GHSA-3qph-f3mq-792v",
  "modified": "2022-10-22T12:00:28Z",
  "published": "2022-05-24T22:28:09Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-20999"
    },
    {
      "type": "WEB",
      "url": "https://cert.vde.com/en-us/advisories/vde-2021-016"
    }
  ],
  "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"
    }
  ]
}

GSD-2021-20999

Vulnerability from gsd - Updated: 2023-12-13 01:23

Details

Aliases

CVE-2021-20999

Aliases

CVE-2021-20999

JSON

To clipboard

{
  "GSD": {
    "alias": "CVE-2021-20999",
    "description": "In Weidm\u00fcller u-controls and IoT-Gateways in versions up to 1.12.1 a network port intended only for device-internal usage is accidentally accessible via external network interfaces. By exploiting this vulnerability the device may be manipulated or the operation may be stopped.",
    "id": "GSD-2021-20999"
  },
  "gsd": {
    "metadata": {
      "exploitCode": "unknown",
      "remediation": "unknown",
      "reportConfidence": "confirmed",
      "type": "vulnerability"
    },
    "osvSchema": {
      "aliases": [
        "CVE-2021-20999"
      ],
      "details": "In Weidm\u00fcller u-controls and IoT-Gateways in versions up to 1.12.1 a network port intended only for device-internal usage is accidentally accessible via external network interfaces. By exploiting this vulnerability the device may be manipulated or the operation may be stopped.",
      "id": "GSD-2021-20999",
      "modified": "2023-12-13T01:23:12.293967Z",
      "schema_version": "1.4.0"
    }
  },
  "namespaces": {
    "cve.org": {
      "CVE_data_meta": {
        "ASSIGNER": "info@cert.vde.com",
        "DATE_PUBLIC": "2021-05-04T10:00:00.000Z",
        "ID": "CVE-2021-20999",
        "STATE": "PUBLIC",
        "TITLE": "WEIDMUELLER: Accidentally open network port in u-controls and IoT-Gateways"
      },
      "affects": {
        "vendor": {
          "vendor_data": [
            {
              "product": {
                "product_data": [
                  {
                    "product_name": "UC20-WL2000-AC (No. 1334950000)",
                    "version": {
                      "version_data": [
                        {
                          "version_affected": "\u003c=",
                          "version_name": "1.3.0",
                          "version_value": "1.9.0"
                        },
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}

VDE-2021-016

Vulnerability from csaf_weidmuellerinterfacegmbhcokg - Published: 2021-05-04 08:17 - Updated: 2025-05-14 12:28

Summary

Weidmueller: Accidentally open network port in u-controls and IoT-Gateways

Scope

1 vulnerability in this advisory, including CVE-2021-20999.

CVE-2021-20999

In Weidmueller u-controls and IoT-Gateways in versions up to 1.12.1 a network port intended only for device-internal usage is accidentally accessible via external network interfaces. By exploiting this vulnerability the device may be manipulated or the operation may be stopped.

9.8 (Critical)


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

Known affected: 16 products Fixed: 16 products

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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.

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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

CVE-2021-20999 (GCVE-0-2021-20999)

FKIE_CVE-2021-20999

GHSA-3QPH-F3MQ-792V

GSD-2021-20999

VDE-2021-016

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