CVE-2021-28814

Name: CVE-2021-28814
Creator: NVD / NIST
Published: 2021-06-11T07:15:06.657+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.8/10EPSS 1.23%

Last modified Jun 17, 2026

CVE-2021-28814 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. An improper access control vulnerability has been reported to affect QNAP NAS. If exploited, this vulnerability allows remote attackers to compromise the security of the software. EPSS estimates a 1.23% chance of exploitation in the next 30 days.

Description

An improper access control vulnerability has been reported to affect QNAP NAS. If exploited, this vulnerability allows remote attackers to compromise the security of the software. This issue affects: QNAP Systems Inc. Helpdesk versions prior to 3.0.4.

Metrics

CVSS 3.1

8.8/10

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

EPSS Probability

1.23%

65.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-269

Affected Software

Vendor	Product	Versions
Qnap	Helpdesk	< 3.0.4

References

https://www.qnap.com/zh-tw/security-advisory/qsa-21-25Vendor Advisory
https://www.qnap.com/zh-tw/security-advisory/qsa-21-25Vendor Advisory

Timeline

Published: Jun 11, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-28814?

How severe is CVE-2021-28814?

CVE-2021-28814 has a CVSS score of 8.8/10 (HIGH severity). The EPSS model estimates a 1.23% probability of exploitation in the next 30 days.

How do I fix CVE-2021-28814?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-28814?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST