CVE-2021-28799

CRITICALCISA KEV

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 .

CVE Details

CVSS v3.1 Score10.0

SeverityCRITICAL

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

Attack VectorNETWORK

ComplexityLOW

Privileges RequiredNONE

User InteractionNONE

Published5/13/2021

Last Modified11/3/2025

Sourcekev

Honeypot Sightings0

CISA KEV

VendorQNAP

ProductNetwork Attached Storage (NAS)

Vulnerability NameQNAP NAS Improper Authorization Vulnerability

KEV Date Added2022-03-31

Remediation Due Date2022-04-21

Ransomware UseKnown

Affected Products

qnap:hybrid_backup_syncqnap:qtsqnap:quts_heroqnap:qutscloud

Weaknesses (CWE)

CWE-285

References

https://www.qnap.com/en/security-advisory/QSA-21-13(security@qnapsecurity.com.tw)

https://www.qnap.com/en/security-advisory/QSA-21-13(af854a3a-2127-422b-91ae-364da2661108)

https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-28799(134c704f-9b21-4f2e-91b3-4a467353bcc0)

IOC Correlations

No correlations recorded

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