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CVE-2021-28806

Estado: ModificadaMedia (5.4)—

A DOM-based XSS vulnerability has been reported to affect QNAP NAS running QTS and QuTS hero. If exploited, this vulnerability allows attackers to inject malicious code. This issue affects: QNAP Systems Inc. QTS versions prior to 4.5.3.1652 Build 20210428. QNAP Systems Inc. QuTS hero versions prior to h4.5.2.1638 Build 20210414. QNAP Systems Inc. QuTScloud versions prior to c4.5.5.1656 Build 20210503. This issue does not affect: QNAP Systems Inc. QTS 4.3.6; 4.3.3.

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)

Mostrar
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  "id": "CVE-2021-28806",
  "cveTags": [],
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        "type": "Primary",
        "source": "nvd@nist.gov",
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          "baseScore": 3.5,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:M/Au:S/C:N/I:P/A:N",
          "authentication": "SINGLE",
          "integrityImpact": "PARTIAL",
          "accessComplexity": "MEDIUM",
          "availabilityImpact": "NONE",
          "confidentialityImpact": "NONE"
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        "acInsufInfo": false,
        "impactScore": 2.9,
        "baseSeverity": "LOW",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 6.8,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": true
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    "cvssMetricV31": [
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        "type": "Secondary",
        "source": "security@qnapsecurity.com.tw",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 5.7,
          "attackVector": "NETWORK",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N",
          "integrityImpact": "NONE",
          "userInteraction": "REQUIRED",
          "attackComplexity": "LOW",
          "availabilityImpact": "NONE",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "HIGH"
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  "affected": [
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          "vendor": "QNAP Systems Inc.",
          "product": "QTS",
          "versions": [
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              "status": "affected",
              "version": "unspecified",
              "lessThan": "4.5.3.1652 Build 20210428",
              "versionType": "custom"
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              "status": "unaffected",
              "version": "4.3.6"
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              "status": "unaffected",
              "version": "4.3.3"
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          "vendor": "QNAP Systems Inc.",
          "product": "QuTS hero",
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              "version": "unspecified",
              "lessThan": "h4.5.2.1638 Build 20210414",
              "versionType": "custom"
            }
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        },
        {
          "vendor": "QNAP Systems Inc.",
          "product": "QuTScloud",
          "versions": [
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              "status": "affected",
              "version": "unspecified",
              "lessThan": "c4.5.5.1656 Build 20210503",
              "versionType": "custom"
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  ],
  "published": "2021-06-03T03:15:08.437",
  "references": [
    {
      "url": "https://www.qnap.com/zh-tw/security-advisory/qsa-21-22",
      "tags": [
        "Vendor Advisory"
      ],
      "source": "security@qnapsecurity.com.tw"
    },
    {
      "url": "https://www.qnap.com/zh-tw/security-advisory/qsa-21-22",
      "tags": [
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      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "security@qnapsecurity.com.tw",
      "description": [
        {
          "lang": "en",
          "value": "CWE-79"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "A DOM-based XSS vulnerability has been reported to affect QNAP NAS running QTS and QuTS hero. If exploited, this vulnerability allows attackers to inject malicious code. This issue affects: QNAP Systems Inc. QTS versions prior to 4.5.3.1652 Build 20210428. QNAP Systems Inc. QuTS hero versions prior to h4.5.2.1638 Build 20210414. QNAP Systems Inc. QuTScloud versions prior to c4.5.5.1656 Build 20210503. This issue does not affect: QNAP Systems Inc. QTS 4.3.6; 4.3.3."
    },
    {
      "lang": "es",
      "value": "Se ha reportado una vulnerabilidad de tipo XSS basada en DOM que afecta a los NAS de QNAP que ejecutan QTS y QuTS hero. Si es explotada, esta vulnerabilidad permite a los atacantes inyectar código malicioso. Este problema afecta: QNAP Systems Inc. QTS versiones anteriores a 4.5.3.1652 Build 20210428. QNAP Systems Inc. QuTS hero versiones anteriores a h4.5.2.1638 Build 20210414. QNAP Systems Inc. versiones de QuTScloud anteriores a versión c4.5.5.1656 Build 20210503. Este problema no afecta: QNAP Systems Inc. QTS versiones 4.3.6; 4.3.3"
    }
  ],
  "lastModified": "2026-06-17T03:46:53.883",
  "configurations": [
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