CVE-2021-28802: QNAP QTS

Critical severity, CVSS 9.8. 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.

Affected products

• QNAP QTS: before 4.5.1.1540 (fixed in 4.5.1.1540)
• QNAP Quts Hero: before h4.5.1.1582 (fixed in h4.5.1.1582)

Published 2021-07-01. Last modified 2026-06-17.