Vulnerability-Lookup

GHSA-4V9X-J7PR-8WXQ

Vulnerability from github – Published: 2022-05-24 19:02 – Updated: 2025-10-22 00:32

Details

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 .

Severity

9.8 (Critical)


                  
                    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

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{
  "affected": [],
  "aliases": [
    "CVE-2021-28799"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-285",
      "CWE-863"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2021-05-13T03:15:00Z",
    "severity": "CRITICAL"
  },
  "details": "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 .",
  "id": "GHSA-4v9x-j7pr-8wxq",
  "modified": "2025-10-22T00:32:13Z",
  "published": "2022-05-24T19:02:24Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-28799"
    },
    {
      "type": "WEB",
      "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-28799"
    },
    {
      "type": "WEB",
      "url": "https://www.qnap.com/en/security-advisory/QSA-21-13"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2021-28799 (GCVE-0-2021-28799)

Vulnerability from cvelistv5 – Published: 2021-05-13 02:55 – Updated: 2025-10-21 23:25

Title

Improper Authorization Vulnerability in HBS 3 (Hybrid Backup Sync)

Summary

Severity

10 (Critical)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

SSVC

Exploitation: active Automatable: yes Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2025-02-04 14:53 UTC

CWE

CWE-285 - Improper Authorization

Assigner

qnap mitre root

References

2 references

URL	Tags
https://www.qnap.com/en/security-advisory/QSA-21-13	x_refsource_MISC
https://www.cisa.gov/known-exploited-vulnerabilit…	government-resource

Impacted products

6 products

Vendor	Product	Version
QNAP Systems Inc.	HBS 3	Affected: unspecified , < v16.0.0415 (custom)
QNAP Systems Inc.	HBS 3	Affected: unspecified , < v3.0.210412 (custom)
QNAP Systems Inc.	HBS 3	Affected: unspecified , < v3.0.210411 (custom)
QNAP Systems Inc.	HBS 3	Affected: unspecified , < v16.0.0419 (custom)
QNAP Systems Inc.	HBS 2	Unaffected: all versions
QNAP Systems Inc.	HBS 1.3	Unaffected: all versions

Date Public

2021-04-22 00:00

Credits

ZUSO ART

Show details on NVD website

JSON

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Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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GHSA-4V9X-J7PR-8WXQ

CVE-2021-28799 (GCVE-0-2021-28799)

Tags

Sightings

Nomenclature

Related by attack behaviour