CVE-2021-28802: Command Injection Vulnerabilities in QTS and QuTS hero

Severity: critical (CVSS 9.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.8% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2021-07-01 · updated 2026-06-17
Weakness: CWE-78

Description

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.

Affected products

QNAP QTS: before 4.5.1.1540 — fixed in 4.5.1.1540
QNAP Systems Inc. QuTS hero: before h4.5.1.1582 — fixed in h4.5.1.1582

How to fix

Upgrade to a fixed version: QNAP QTS 4.5.1.1540; QNAP Systems Inc. QuTS hero h4.5.1.1582. Check the vendor advisory for mitigations.

References

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