CVE-2021-44054: QNAP QTS

Medium severity, CVSS 6.1. EPSS: 0.6% chance of exploitation in the next 30 days.

An open redirect vulnerability has been reported to affect QNAP device running QuTScloud, QuTS hero and QTS. If exploited, this vulnerability allows attackers to redirect users to an untrusted page that contains malware. 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 h5.0.0.1949 build 20220215 and later QuTS hero h4.5.4.1951 build 20220218 and later QTS 5.0.0.1986 build 20220324 and later QTS 4.5.4.1991 build 20220329 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.