CVE-2021-44051: QNAP QTS

High severity, CVSS 8.8. EPSS: 1.7% chance of exploitation in the next 30 days.

A command injection vulnerability has been reported to affect QNAP NAS running QuTScloud, QuTS hero and QTS. If exploited, this vulnerability allows remote attackers to run arbitrary commands. We have already fixed this vulnerability in the following versions of QuTScloud, QuTS hero and QTS: QuTScloud c5.0.1.1949 and later QuTS hero h5.0.0.1986 build 20220324 and later QTS 5.0.0.1986 build 20220324 and later

Affected products

• QNAP QTS: from 5.0.0.1716, before 5.0.0.1986 (fixed in 5.0.0.1986); from 4.3.3.0174, before 4.3.3.1945 (fixed in 4.3.3.1945); from 4.3.4.0899, before 4.3.4.1976 (fixed in 4.3.4.1976); from 4.3.6.0895, before 4.3.6.1965 (fixed in 4.3.6.1965); from 4.4.0.0883, before 4.5.4.1991 (fixed in 4.5.4.1991); version 4.2.6 only
• QNAP Quts Hero: before h4.5.4.1771 (fixed in h4.5.4.1771); from h5.0.0.1772, before h5.0.0.1986 (fixed in h5.0.0.1986)
• QNAP Qutscloud: before c5.0.1.1998 (fixed in c5.0.1.1998)

Published 2022-05-05. Last modified 2026-06-17.