CVE-2021-28802

9.8 criticalEPSS 1.8%

Critical (9.8) in qnap. EPSS 1.8% chance of exploitation in the next 30 days.

A command injection vulnerabilities have been reported to affect QTS and QuTS hero. If exploited, this vulnerability allows attackers to execute arbitrary commands in a compromised application. This issue affects: QNAP Systems Inc. QTS versions prior to 4.5.1.1540 build 20210107. QNAP Systems Inc. QuTS hero versions prior to h4.5.1.1582 build 20210217.

Severity

CVSS 3.1

9.8 critical

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

EPSS: 1.8% chance of exploitation in the next 30 days; higher than 78% of CVEs (scores of 2026-10-31)
CWE: CWE-78
Published: 2021-07-01
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

qnap:qts
qnap:quts_hero

References

https://www.qnap.com/zh-tw/security-advisory/qsa-21-29
https://www.qnap.com/zh-tw/security-advisory/qsa-21-29

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