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CVE-2021-28799

Published: May 13, 2021Modified: Nov 3, 2025CISA KEV

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9.8
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Exploitability: 3.9 / Impact: 5.9
Source: NVD

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 .

Affected (4)

1 product
Hybrid Backup Sync
Configuration A
1 vulnerable · 1 platform
Vulnerable SoftwareAffected Versions
Before 16.0.0415
Running on/withPlatform Versions
Qnap
Qts
Version 4.5.2
Configuration B
1 vulnerable · 1 platform
Vulnerable SoftwareAffected Versions
Before 3.0.210412
Running on/withPlatform Versions
Qnap
Qts
Version 4.3.6
Configuration C
1 vulnerable · 2 platform
Vulnerable SoftwareAffected Versions
Before 3.0.210411
Running on/withPlatform Versions
Qnap
Qts
Version 4.3.3
Qnap
Qts
Version 4.3.4
Configuration D
1 platform
Running on/withPlatform Versions
Qnap
Quts Hero
Version h4.5.1
Configuration E
1 vulnerable · 1 platform
Vulnerable SoftwareAffected Versions
Before 16.0.0419
Running on/withPlatform Versions
Qnap
Qutscloud
From c4.5.1 to c4.5.4

References (3)

Source: security@qnapsecurity.com.tw
Vendor Advisory
Source: af854a3a-2127-422b-91ae-364da2661108
Vendor Advisory
Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0
US Government Resource

Timeline

No history available yet.