FKIE_CVE-2021-3774

Vulnerability from fkie_nvd - Published: 2021-11-05 21:15 - Updated: 2026-06-17 04:05
Severity
7.4 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:N/A:N
6.5 (Medium) - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
Summary
Meross Smart Wi-Fi 2 Way Wall Switch (MSS550X), on its 3.1.3 version and before, creates an open Wi-Fi Access Point without the required security measures in its initial setup. This could allow a remote attacker to obtain the Wi-Fi SSID as well as the password configured by the user from Meross app via Http/JSON plain request.
References
cve-coordination@incibe.eshttps://www.incibe.es/en/incibe-cert/notices/aviso/meross-mss550x-missing-encryption-sensitive-data
af854a3a-2127-422b-91ae-364da2661108https://www.incibe.es/en/incibe-cert/notices/aviso/meross-mss550x-missing-encryption-sensitive-data
Impacted products
Vendor Product Version
meross mss550x_firmware *
meross mss550x -
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Meross Smart Wi-Fi 2 Way Wall Switch",
          "vendor": "Meross",
          "versions": [
            {
              "lessThanOrEqual": "3.1.3",
              "status": "affected",
              "version": "0",
              "versionType": "custom"
            }
          ]
        }
      ],
      "source": "cve-coordination@incibe.es"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:meross:mss550x_firmware:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "E1C85657-9D38-488C-9CAA-BCCE5679E5C5",
              "versionEndIncluding": "3.1.3",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        },
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:h:meross:mss550x:-:*:*:*:*:*:*:*",
              "matchCriteriaId": "6B6C29E4-18D8-4F1B-805E-D38CF4F6141A",
              "vulnerable": false
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ],
      "operator": "AND"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Meross Smart Wi-Fi 2 Way Wall Switch (MSS550X), on its 3.1.3 version and before, creates an open Wi-Fi Access Point without the required security measures in its initial setup. This could allow a remote attacker to obtain the Wi-Fi SSID as well as the password configured by the user from Meross app via Http/JSON plain request."
    },
    {
      "lang": "es",
      "value": "Meross Smart Wi-Fi 2 Way Wall Switch (MSS550X), en su versi\u00f3n 3.1.3 y anteriores, crea un punto de acceso Wi-Fi abierto sin las medidas de seguridad necesarias en su configuraci\u00f3n inicial. Esto podr\u00eda permitir a un atacante remoto obtener el SSID Wi-Fi as\u00ed como la contrase\u00f1a configurada por el usuario desde la app de Meross por medio de una petici\u00f3n Http/JSON simple"
    }
  ],
  "id": "CVE-2021-3774",
  "lastModified": "2026-06-17T04:05:44.280",
  "metrics": {
    "cvssMetricV2": [
      {
        "acInsufInfo": false,
        "baseSeverity": "MEDIUM",
        "cvssData": {
          "accessComplexity": "MEDIUM",
          "accessVector": "NETWORK",
          "authentication": "NONE",
          "availabilityImpact": "NONE",
          "baseScore": 4.3,
          "confidentialityImpact": "PARTIAL",
          "integrityImpact": "NONE",
          "vectorString": "AV:N/AC:M/Au:N/C:P/I:N/A:N",
          "version": "2.0"
        },
        "exploitabilityScore": 8.6,
        "impactScore": 2.9,
        "obtainAllPrivilege": false,
        "obtainOtherPrivilege": false,
        "obtainUserPrivilege": false,
        "source": "nvd@nist.gov",
        "type": "Primary",
        "userInteractionRequired": true
      }
    ],
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 7.4,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "CHANGED",
          "userInteraction": "REQUIRED",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:N/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 2.8,
        "impactScore": 4.0,
        "source": "cve-coordination@incibe.es",
        "type": "Secondary"
      },
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 6.5,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "REQUIRED",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 2.8,
        "impactScore": 3.6,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2021-3774",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2025-04-23T13:10:15.464816Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2021-11-05T21:15:08.480",
  "references": [
    {
      "source": "cve-coordination@incibe.es",
      "url": "https://www.incibe.es/en/incibe-cert/notices/aviso/meross-mss550x-missing-encryption-sensitive-data"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "url": "https://www.incibe.es/en/incibe-cert/notices/aviso/meross-mss550x-missing-encryption-sensitive-data"
    }
  ],
  "sourceIdentifier": "cve-coordination@incibe.es",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-319"
        }
      ],
      "source": "cve-coordination@incibe.es",
      "type": "Secondary"
    },
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-319"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}



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