CVE-2021-28799
Published: May 13, 2021
Modified: Oct 21, 2025
CVSS v3.1
10.0
Description
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 .
| Vendor | Product | Versions |
|---|---|---|
QNAP Systems Inc. | HBS 3 | affected unspecified - < v16.0.0415 |
QNAP Systems Inc. | HBS 3 | affected unspecified - < v3.0.210412 |
QNAP Systems Inc. | HBS 3 | affected unspecified - < v3.0.210411 |
QNAP Systems Inc. | HBS 3 | affected unspecified - < v3.0.210411 |
QNAP Systems Inc. | HBS 3 | affected unspecified - < v16.0.0419 |
QNAP Systems Inc. | HBS 3 | affected unspecified - < v16.0.0419 |
QNAP Systems Inc. | HBS 2 | unaffected all versions |
QNAP Systems Inc. | HBS 1.3 | unaffected all versions |
Weaknesses (CWE)
CVSS v3.1 Details
CVSS v3.1 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
References
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