Vulnerability-Lookup

CVE-2020-37220 (GCVE-0-2020-37220)

Vulnerability from cvelistv5 – Published: 2026-05-13 14:22 – Updated: 2026-05-26 11:51

Title

Huawei HG630 V2 Router Authentication Bypass via Serial Number

Summary

Huawei HG630 V2 router contains an authentication bypass vulnerability that allows unauthenticated attackers to obtain administrative access by retrieving the device serial number. Attackers can query the /api/system/deviceinfo endpoint without authentication to extract the SerialNumber field, then use the last 8 characters as the default password to log in to the router.

Severity

8.7 (High)


                        
                          CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N

7.5 (High)


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

SSVC

Exploitation: poc Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-05-14 13:41 UTC

CWE

CWE-798 - Use of Hard-coded Credentials

Assigner

VulnCheck mitre root

References

3 references

URL	Tags
https://www.exploit-db.com/exploits/48310	exploit
https://www.youtube.com/watch?v=vOrIL7L_cVc	third-party-advisory
https://www.vulncheck.com/advisories/huawei-hg630…	third-party-advisory

Impacted products

1 product

Vendor	Product	Version	CPE status
www.huawei.com	HG630 V2 Router	Affected: 0 (custom)	guessed

Date Public

2020-04-13 00:00

Credits

Eslam Medhat

Show details on NVD website

JSON

To clipboard

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FKIE_CVE-2020-37220

Vulnerability from fkie_nvd - Published: 2026-05-13 16:16 - Updated: 2026-06-17 03:17

Severity

7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Summary

References

	URL	Tags
	disclosure@vulncheck.com	https://www.exploit-db.com/exploits/48310
	disclosure@vulncheck.com	https://www.vulncheck.com/advisories/huawei-hg630-v2-router-authentication-bypass-via-serial-number
	disclosure@vulncheck.com	https://www.youtube.com/watch?v=vOrIL7L_cVc

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "HG630 V2 Router",
          "vendor": "www.huawei.com",
          "versions": [
            {
              "status": "affected",
              "version": "0",
              "versionType": "custom"
            }
          ]
        }
      ],
      "source": "disclosure@vulncheck.com"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Huawei HG630 V2 router contains an authentication bypass vulnerability that allows unauthenticated attackers to obtain administrative access by retrieving the device serial number. Attackers can query the /api/system/deviceinfo endpoint without authentication to extract the SerialNumber field, then use the last 8 characters as the default password to log in to the router."
    }
  ],
  "id": "CVE-2020-37220",
  "lastModified": "2026-06-17T03:17:17.393",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 7.5,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
          "version": "3.1"
        },
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        "impactScore": 3.6,
        "source": "disclosure@vulncheck.com",
        "type": "Secondary"
      }
    ],
    "cvssMetricV40": [
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          "Recovery": "NOT_DEFINED",
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          "attackVector": "NETWORK",
          "availabilityRequirement": "NOT_DEFINED",
          "baseScore": 8.7,
          "baseSeverity": "HIGH",
          "confidentialityRequirement": "NOT_DEFINED",
          "exploitMaturity": "NOT_DEFINED",
          "integrityRequirement": "NOT_DEFINED",
          "modifiedAttackComplexity": "NOT_DEFINED",
          "modifiedAttackRequirements": "NOT_DEFINED",
          "modifiedAttackVector": "NOT_DEFINED",
          "modifiedPrivilegesRequired": "NOT_DEFINED",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
          "modifiedSubConfidentialityImpact": "NOT_DEFINED",
          "modifiedSubIntegrityImpact": "NOT_DEFINED",
          "modifiedUserInteraction": "NOT_DEFINED",
          "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
          "modifiedVulnConfidentialityImpact": "NOT_DEFINED",
          "modifiedVulnIntegrityImpact": "NOT_DEFINED",
          "privilegesRequired": "NONE",
          "providerUrgency": "NOT_DEFINED",
          "subAvailabilityImpact": "NONE",
          "subConfidentialityImpact": "NONE",
          "subIntegrityImpact": "NONE",
          "userInteraction": "NONE",
          "valueDensity": "NOT_DEFINED",
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  "vulnStatus": "Deferred",
  "weaknesses": [
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}

GHSA-H3FJ-FCHJ-5WRP

Vulnerability from github – Published: 2026-05-13 18:30 – Updated: 2026-05-13 18:30

Details

Severity

7.5 (High)


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

8.7 (High)


                  
                    CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2020-37220"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-798"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-05-13T16:16:33Z",
    "severity": "HIGH"
  },
  "details": "Huawei HG630 V2 router contains an authentication bypass vulnerability that allows unauthenticated attackers to obtain administrative access by retrieving the device serial number. Attackers can query the /api/system/deviceinfo endpoint without authentication to extract the SerialNumber field, then use the last 8 characters as the default password to login to the router.",
  "id": "GHSA-h3fj-fchj-5wrp",
  "modified": "2026-05-13T18:30:53Z",
  "published": "2026-05-13T18:30:53Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2020-37220"
    },
    {
      "type": "WEB",
      "url": "https://www.exploit-db.com/exploits/48310"
    },
    {
      "type": "WEB",
      "url": "https://www.vulncheck.com/advisories/huawei-hg630-v2-router-authentication-bypass-via-serial-number"
    },
    {
      "type": "WEB",
      "url": "https://www.youtube.com/watch?v=vOrIL7L_cVc"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/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:X/R:X/V:X/RE:X/U:X",
      "type": "CVSS_V4"
    }
  ]
}

WID-SEC-W-2026-1545

Vulnerability from csaf_certbund - Published: 2026-05-14 22:00 - Updated: 2026-05-14 22:00

Summary

Huawei Router: Schwachstelle ermöglicht Offenlegung von Informationen und Admin-Zugriff

Severity

Hoch

Notes

Das BSI ist als Anbieter für die eigenen, zur Nutzung bereitgestellten Inhalte nach den allgemeinen Gesetzen verantwortlich. Nutzerinnen und Nutzer sind jedoch dafür verantwortlich, die Verwendung und/oder die Umsetzung der mit den Inhalten bereitgestellten Informationen sorgfältig im Einzelfall zu prüfen.

Produktbeschreibung: Router sind Geräte aus dem Bereich Computernetzwerke, Telekommunikation und Internet, die mehrere Rechnernetze miteinander verbinden.

Angriff: Ein entfernter, anonymer Angreifer kann eine Schwachstelle in Huawei Router ausnutzen, um Informationen offenzulegen, die einen administrativen Zugriff ermöglichen.

Betroffene Betriebssysteme: - Hardware Appliance

CVE-2020-37220

Affected products

Known affected 1 product

Product	Identifier	Version	Remediation
Huawei Router HG630 V2 Huawei / Router	`cpe:/h:huawei:router:hg630_v2`	HG630 V2

References

4 references

URL	Category
https://wid.cert-bund.de/.well-known/csaf/white/2…	self
https://wid.cert-bund.de/portal/wid/securityadvis…	self
https://euvd.enisa.europa.eu/enisa/EUVD-2020-31221	external
https://github.com/advisories/GHSA-H3FJ-FCHJ-5WRP	external

JSON

To clipboard

{
  "document": {
    "aggregate_severity": {
      "text": "hoch"
    },
    "category": "csaf_base",
    "csaf_version": "2.0",
    "distribution": {
      "tlp": {
        "label": "WHITE",
        "url": "https://www.first.org/tlp/"
      }
    },
    "lang": "de-DE",
    "notes": [
      {
        "category": "legal_disclaimer",
        "text": "Das BSI ist als Anbieter f\u00fcr die eigenen, zur Nutzung bereitgestellten Inhalte nach den allgemeinen Gesetzen verantwortlich. Nutzerinnen und Nutzer sind jedoch daf\u00fcr verantwortlich, die Verwendung und/oder die Umsetzung der mit den Inhalten bereitgestellten Informationen sorgf\u00e4ltig im Einzelfall zu pr\u00fcfen."
      },
      {
        "category": "description",
        "text": "Router sind Ger\u00e4te aus dem Bereich Computernetzwerke, Telekommunikation und Internet, die mehrere Rechnernetze miteinander verbinden.",
        "title": "Produktbeschreibung"
      },
      {
        "category": "summary",
        "text": "Ein entfernter, anonymer Angreifer kann eine Schwachstelle in Huawei Router ausnutzen, um Informationen offenzulegen, die einen administrativen Zugriff erm\u00f6glichen.",
        "title": "Angriff"
      },
      {
        "category": "general",
        "text": "- Hardware Appliance",
        "title": "Betroffene Betriebssysteme"
      }
    ],
    "publisher": {
      "category": "other",
      "contact_details": "csaf-provider@cert-bund.de",
      "name": "Bundesamt f\u00fcr Sicherheit in der Informationstechnik",
      "namespace": "https://www.bsi.bund.de"
    },
    "references": [
      {
        "category": "self",
        "summary": "WID-SEC-W-2026-1545 - CSAF Version",
        "url": "https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-1545.json"
      },
      {
        "category": "self",
        "summary": "WID-SEC-2026-1545 - Portal Version",
        "url": "https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2026-1545"
      },
      {
        "category": "external",
        "summary": "EUVD Security Advisory vom 2026-05-13",
        "url": "https://euvd.enisa.europa.eu/enisa/EUVD-2020-31221"
      },
      {
        "category": "external",
        "summary": "GitHub Security Advisory GHSA-H3FJ-FCHJ-5WRP",
        "url": "https://github.com/advisories/GHSA-H3FJ-FCHJ-5WRP"
      }
    ],
    "source_lang": "en-US",
    "title": "Huawei Router: Schwachstelle erm\u00f6glicht Offenlegung von Informationen und Admin-Zugriff",
    "tracking": {
      "current_release_date": "2026-05-14T22:00:00.000+00:00",
      "generator": {
        "date": "2026-05-15T11:02:33.923+00:00",
        "engine": {
          "name": "BSI-WID",
          "version": "1.5.0"
        }
      },
      "id": "WID-SEC-W-2026-1545",
      "initial_release_date": "2026-05-14T22:00:00.000+00:00",
      "revision_history": [
        {
          "date": "2026-05-14T22:00:00.000+00:00",
          "number": "1",
          "summary": "Initiale Fassung"
        }
      ],
      "status": "final",
      "version": "1"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "branches": [
              {
                "category": "product_version",
                "name": "HG630 V2",
                "product": {
                  "name": "Huawei Router HG630 V2",
                  "product_id": "T054200",
                  "product_identification_helper": {
                    "cpe": "cpe:/h:huawei:router:hg630_v2"
                  }
                }
              }
            ],
            "category": "product_name",
            "name": "Router"
          }
        ],
        "category": "vendor",
        "name": "Huawei"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2020-37220",
      "product_status": {
        "known_affected": [
          "T054200"
        ]
      },
      "release_date": "2026-05-14T22:00:00.000+00:00",
      "title": "CVE-2020-37220"
    }
  ]
}

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.

Detection rules are retrieved from Rulezet.

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.

Action not permitted

CVE-2020-37220 (GCVE-0-2020-37220)

FKIE_CVE-2020-37220

GHSA-H3FJ-FCHJ-5WRP

WID-SEC-W-2026-1545

Tags

Sightings

Nomenclature