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
Published 2021-07-08 08:15:08
Updated 2021-07-12 16:37:54
View at NVD,   CVE.org
Vulnerability category: BypassGain privilege

Products affected by CVE-2021-28809

Exploit prediction scoring system (EPSS) score for CVE-2021-28809

0.79%
Probability of exploitation activity in the next 30 days EPSS Score History
~ 82 %
Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2021-28809

Base Score Base Severity CVSS Vector Exploitability Score Impact Score Score Source First Seen
10.0
HIGH AV:N/AC:L/Au:N/C:C/I:C/A:C
10.0
10.0
NIST
9.8
CRITICAL CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
3.9
5.9
NIST
9.8
CRITICAL CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
3.9
5.9
QNAP Systems, Inc.

CWE ids for CVE-2021-28809

  • The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor.
    Assigned by: security@qnapsecurity.com.tw (Primary)
  • The product does not perform any authentication for functionality that requires a provable user identity or consumes a significant amount of resources.
    Assigned by: security@qnapsecurity.com.tw (Primary)
  • The product provides an Applications Programming Interface (API) or similar interface for interaction with external actors, but the interface includes a dangerous method or function that is not properly restricted.
    Assigned by: security@qnapsecurity.com.tw (Primary)

References for CVE-2021-28809

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