CVE-2021-28815

4.9 mediumEPSS 1.7%

Medium (4.9) in qnap myqnapcloud link. EPSS 1.7% chance of exploitation in the next 30 days.

Insecure storage of sensitive information has been reported to affect QNAP NAS running myQNAPcloud Link. If exploited, this vulnerability allows remote attackers to read sensitive information by accessing the unrestricted storage mechanism. This issue affects: QNAP Systems Inc. myQNAPcloud Link versions prior to 2.2.21 on QTS 4.5.3; versions prior to 2.2.21 on QuTS hero h4.5.2; versions prior to 2.2.21 on QuTScloud c4.5.4.

Severity

CVSS 3.1

4.9 medium

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

EPSS: 1.7% chance of exploitation in the next 30 days; higher than 77% of CVEs (scores of 2026-10-31)
CWE: CWE-922
Published: 2021-06-16
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

qnap:myqnapcloud_link

References

https://www.qnap.com/zh-tw/security-advisory/qsa-21-26
https://www.qnap.com/zh-tw/security-advisory/qsa-21-26

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