CVE-2021-28809

CriticalCVSS 9.8/10Last modified Jun 17, 2026

Description

An improper access control vulnerability has been reported to affect certain legacy versions of HBS 3. If exploited, this vulnerability allows attackers to compromise the security of the operating system.QNAP have already fixed this vulnerability in the following versions of HBS 3: QTS 4.3.6: HBS 3 v3.0.210507 and later QTS 4.3.4: HBS 3 v3.0.210506 and later QTS 4.3.3: HBS 3 v3.0.210506 and later

Metrics

CVSS 3.1 9.8/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Weakness enumeration

CWE-284 CWE-306 CWE-749

Affected software

No affected versions have been published.

Timeline

Published: Jul 8, 2021
Last modified: Jun 17, 2026
NVD status: Modified

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