Instituto Nacional de ciberseguridad. Sección Incibe
Instituto Nacional de Ciberseguridad. Sección INCIBE-CERT

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CVE-2021-28799

Severity CVSS v4.0:
Pending analysis
Type:
CWE-285 Improper Authorization
Publication date:
13/05/2021
Last modified:
12/03/2025

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 .

Impact

Vector 3.x
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H CVSS v3.1 Severity and Metrics:

Base Score: 10.00 CRITICAL
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope (S): Changed
Confidentiality (C): High
Integrity (I): High
Availability (A): High

Base Score 3.x
10.00
Severity 3.x
CRITICAL
Vector 2.0
AV:N/AC:L/Au:N/C:P/I:P/A:P CVSS v2.0 Severity and Metrics:

Base Score: 7.50 HIGH
Vector: AV:N/AC:L/Au:N/C:P/I:P/A:P

Attack Vector (AV): Network
Attack Complexity (AC): Low
Authentication (Au): None
Confidentiality (C): Physical
Integrity (I): Physical
Availability (A): Physical

Base Score 2.0
7.50
Severity 2.0
HIGH

Vulnerable products and versions

CPE From Up to
cpe:2.3:a:qnap:hybrid_backup_sync:*:*:*:*:*:*:*:* 16.0.0415 (excluding)
cpe:2.3:a:qnap:qts:4.5.2:*:*:*:*:*:*:*
cpe:2.3:a:qnap:hybrid_backup_sync:*:*:*:*:*:*:*:* 3.0.210412 (excluding)
cpe:2.3:o:qnap:qts:4.3.6:*:*:*:*:*:*:*
cpe:2.3:a:qnap:hybrid_backup_sync:*:*:*:*:*:*:*:* 3.0.210411 (excluding)
cpe:2.3:a:qnap:qts:4.3.3:*:*:*:*:*:*:*
cpe:2.3:a:qnap:qts:4.3.4:*:*:*:*:*:*:*
cpe:2.3:a:qnap:hybrid_backup_sync:*:*:*:*:*:*:*:* 16.0.0419 (excluding)
cpe:2.3:o:qnap:quts_hero:h4.5.1:*:*:*:*:*:*:*
cpe:2.3:a:qnap:hybrid_backup_sync:*:*:*:*:*:*:*:* 16.0.0419 (excluding)
cpe:2.3:o:qnap:qutscloud:*:*:*:*:*:*:*:* c4.5.1 (including) c4.5.4 (including)

To consult the complete list of CPE names with products and versions, see this page


References to Advisories, Solutions, and Tools