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CVE-2021-44052

Estado: ModificadaAlta (8.1)—

An improper link resolution before file access ('Link Following') vulnerability has been reported to affect QNAP device running QuTScloud, QuTS hero, and QTS. If exploited, this vulnerability allows remote attackers to traverse the file system to unintended locations and read or overwrite the contents of unexpected files.

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We have already fixed this vulnerability in the following versions of QuTScloud, QuTS hero, and QTS: QuTScloud c5.0.1.1998 and later QuTS hero h4.5.4.1971 build 20220310 and later QuTS hero h5.0.0.1986 build 20220324 and later QTS 4.3.4.1976 build 20220303 and later QTS 4.3.3.1945 build 20220303 and later QTS 4.2.6 build 20220304 and later QTS 4.3.6.1965 build 20220302 and later QTS 5.0.0.1986 build 20220324 and later QTS 4.5.4.1991 build 20220329 and later

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 (3)

Qnap — QTSQnap — Quts HeroQnap — Qutscloud

CWE

Referencias

JSON original (NVD)

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  "id": "CVE-2021-44052",
  "cveTags": [],
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        "source": "nvd@nist.gov",
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          "integrityImpact": "PARTIAL",
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          "confidentialityImpact": "PARTIAL"
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        "acInsufInfo": false,
        "impactScore": 4.9,
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        "obtainAllPrivilege": false,
        "exploitabilityScore": 8,
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          "product": "QuTScloud",
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  "published": "2022-05-05T17:15:10.220",
  "references": [
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      "url": "https://www.qnap.com/en/security-advisory/qsa-22-16",
      "tags": [
        "Vendor Advisory"
      ],
      "source": "security@qnapsecurity.com.tw"
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      "url": "https://www.qnap.com/en/security-advisory/qsa-22-16",
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  "vulnStatus": "Modified",
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      "description": [
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          "value": "CWE-59"
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      "lang": "en",
      "value": "An improper link resolution before file access ('Link Following') vulnerability has been reported to affect QNAP device running QuTScloud, QuTS hero, and QTS. If exploited, this vulnerability allows remote attackers to traverse the file system to unintended locations and read or overwrite the contents of unexpected files. We have already fixed this vulnerability in the following versions of QuTScloud, QuTS hero, and QTS: QuTScloud c5.0.1.1998 and later QuTS hero h4.5.4.1971 build 20220310 and later QuTS hero h5.0.0.1986 build 20220324 and later QTS 4.3.4.1976 build 20220303 and later QTS 4.3.3.1945 build 20220303 and later QTS 4.2.6 build 20220304 and later QTS 4.3.6.1965 build 20220302 and later QTS 5.0.0.1986 build 20220324 and later QTS 4.5.4.1991 build 20220329 and later"
    },
    {
      "lang": "es",
      "value": "Se ha informado de una vulnerabilidad de resolución de enlaces inapropiada antes del acceso a los archivos (\"Link Following\") que afecta a los dispositivos QNAP que ejecutan QuTScloud, QuTS hero y QTS. Si es explotada, esta vulnerabilidad permite a atacantes remotos saltar el sistema de archivos hasta ubicaciones no deseadas y leer o sobrescribir el contenido de archivos no esperados. Ya hemos corregido esta vulnerabilidad en las siguientes versiones de QuTScloud, QuTS hero y QTS: QuTScloud c5.0.1.1998 y posteriores QuTS hero h4.5.4.1971 build 20220310 y posteriores QuTS hero h5.0.0.1986 build 20220324 y posteriores QTS 4.3.4.1976 build 20220303 y posteriores QTS 4.3.3. 1945 build 20220303 y posteriores QTS 4.2.6 build 20220304 y posteriores QTS 4.3.6.1965 build 20220302 y posteriores QTS 5.0.0.1986 build 20220324 y posteriores QTS 4.5.4.1991 build 20220329 y posteriores"
    }
  ],
  "lastModified": "2026-06-17T04:11:51.537",
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