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CVE-2021-41635

Estado: ModificadaAlta (8.8)—

When installed as Windows service MELAG FTP Server 2.2.0.4 is run as SYSTEM user, which grants remote attackers to abuse misconfigurations or vulnerabilities with administrative access over the entire host system.

CVSS

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

Tecnologías afectadas (1)

Melag — FTP Server

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2021-41635",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "baseScore": 9,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:L/Au:S/C:C/I:C/A:C",
          "authentication": "SINGLE",
          "integrityImpact": "COMPLETE",
          "accessComplexity": "LOW",
          "availabilityImpact": "COMPLETE",
          "confidentialityImpact": "COMPLETE"
        },
        "acInsufInfo": false,
        "impactScore": 10,
        "baseSeverity": "HIGH",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 8,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 8.8,
          "attackVector": "NETWORK",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 5.9,
        "exploitabilityScore": 2.8
      }
    ]
  },
  "affected": [
    {
      "source": "cve@mitre.org",
      "affectedData": [
        {
          "vendor": "n/a",
          "product": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ]
    }
  ],
  "published": "2022-06-24T12:15:08.063",
  "references": [
    {
      "url": "https://www.securesystems.de/blog/advisory-and-exploitation-the-melag-ftp-server/",
      "tags": [
        "Exploit",
        "Third Party Advisory"
      ],
      "source": "cve@mitre.org"
    },
    {
      "url": "https://www.securesystems.de/blog/advisory-and-exploitation-the-melag-ftp-server/",
      "tags": [
        "Exploit",
        "Third Party Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-276"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "When installed as Windows service MELAG FTP Server 2.2.0.4 is run as SYSTEM user, which grants remote attackers to abuse misconfigurations or vulnerabilities with administrative access over the entire host system."
    },
    {
      "lang": "es",
      "value": "Cuando es instalado como servicio de Windows, MELAG FTP Server versión 2.2.0.4, es ejecutado como usuario SYSTEM, lo que permite a atacantes remotos abusar de configuraciones erróneas o vulnerabilidades con acceso administrativo sobre todo el sistema anfitrión"
    }
  ],
  "lastModified": "2026-06-17T04:08:44.653",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:melag:ftp_server:2.2.0.4:*:*:*:*:*:*:*",
              "vulnerable": true,
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            }
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          "operator": "OR"
        },
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            }
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      "operator": "AND"
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  "sourceIdentifier": "cve@mitre.org"
}