FKIE_CVE-2021-28799

Vulnerability from fkie_nvd - Published: 2021-05-13 03:15 - Updated: 2026-06-17 03:46
Severity
10.0 (Critical) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
9.8 (Critical) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Summary
An improper authorization vulnerability has been reported to affect QNAP NAS running HBS 3 (Hybrid Backup Sync. ) If exploited, the vulnerability allows remote attackers to log in to a device. This issue affects: QNAP Systems Inc. HBS 3 versions prior to v16.0.0415 on QTS 4.5.2; versions prior to v3.0.210412 on QTS 4.3.6; versions prior to v3.0.210411 on QTS 4.3.4; versions prior to v3.0.210411 on QTS 4.3.3; versions prior to v16.0.0419 on QuTS hero h4.5.1; versions prior to v16.0.0419 on QuTScloud c4.5.1~c4.5.4. This issue does not affect: QNAP Systems Inc. HBS 2 . QNAP Systems Inc. HBS 1.3 .
References
security@qnapsecurity.com.twhttps://www.qnap.com/en/security-advisory/QSA-21-13Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108https://www.qnap.com/en/security-advisory/QSA-21-13Vendor Advisory
134c704f-9b21-4f2e-91b3-4a467353bcc0https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-28799US Government Resource
Impacted products
Vendor Product Version
qnap hybrid_backup_sync *
qnap qts 4.5.2
qnap hybrid_backup_sync *
qnap qts 4.3.6
qnap hybrid_backup_sync *
qnap qts 4.3.3
qnap qts 4.3.4
qnap hybrid_backup_sync *
qnap quts_hero h4.5.1
qnap hybrid_backup_sync *
qnap qutscloud *
To clipboard 

{
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          ],
          "product": "HBS 3",
          "vendor": "QNAP Systems Inc.",
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          ],
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          "vendor": "QNAP Systems Inc.",
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          "vendor": "QNAP Systems Inc.",
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        {
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          "vendor": "QNAP Systems Inc.",
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            }
          ]
        },
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          "vendor": "QNAP Systems Inc.",
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            }
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    }
  ],
  "cisaActionDue": "2022-04-21",
  "cisaExploitAdd": "2022-03-31",
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  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "An improper authorization vulnerability has been reported to affect QNAP NAS running HBS 3 (Hybrid Backup Sync. ) If exploited, the vulnerability allows remote attackers to log in to a device. This issue affects: QNAP Systems Inc. HBS 3 versions prior to v16.0.0415 on QTS 4.5.2; versions prior to v3.0.210412 on QTS 4.3.6; versions prior to v3.0.210411 on QTS 4.3.4; versions prior to v3.0.210411 on QTS 4.3.3; versions prior to v16.0.0419 on QuTS hero h4.5.1; versions prior to v16.0.0419 on QuTScloud c4.5.1~c4.5.4. This issue does not affect: QNAP Systems Inc. HBS 2 . QNAP Systems Inc. HBS 1.3 ."
    },
    {
      "lang": "es",
      "value": "Se ha reportado una vulnerabilidad de autorizaci\u00f3n inapropiada que afecta al QNAP NAS que ejecuta HBS versi\u00f3n 3 (Hybrid Backup Sync). Si es explotada, la vulnerabilidad permite a atacantes remotos iniciar sesi\u00f3n en un dispositivo. Este problema afecta a: QNAP Systems Inc. HBS 3 versiones anteriores a v16.0.0415 en QTS versi\u00f3n 4.5.2; versiones anteriores a v3.0.210412 en QTS versi\u00f3n 4.3.6; versiones anteriores a v3.0.210411 en QTS versi\u00f3n 4.3.4; versiones anteriores a v3.0.210411 en QTS versi\u00f3n 4.3.3; versiones anteriores a 16.0.0419 en QuTS hero versiones h4.5.1; anterior a versi\u00f3n v16.0.0419 en QuTScloud versiones c4.5.1~c4.5.4. Este problema no afecta a: QNAP Systems Inc. HBS versi\u00f3n 2. QNAP Systems Inc. HBS versi\u00f3n 1.3"
    }
  ],
  "id": "CVE-2021-28799",
  "lastModified": "2026-06-17T03:46:53.003",
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        "acInsufInfo": false,
        "baseSeverity": "HIGH",
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          "accessComplexity": "LOW",
          "accessVector": "NETWORK",
          "authentication": "NONE",
          "availabilityImpact": "PARTIAL",
          "baseScore": 7.5,
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        "exploitabilityScore": 10.0,
        "impactScore": 6.4,
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          "confidentialityImpact": "HIGH",
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          "privilegesRequired": "NONE",
          "scope": "CHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H",
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          "options": [
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            {
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            {
              "technicalImpact": "total"
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          "role": "CISA Coordinator",
          "timestamp": "2025-02-04T14:53:29.275519Z",
          "version": "2.0.3"
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  "published": "2021-05-13T03:15:06.843",
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  "vulnStatus": "Analyzed",
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      "source": "nvd@nist.gov",
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}



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