CVE-2021-44054

mediumpriority · track · 24EPSS 0.006 · 48 %ileEURUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

0.58% (48th) EPSS

CVSS 5.8 · medium

Is it mine?

33 products

Check your exposure

Who says so?

3 sources

cnnvd · enisa_euvd · fstec_bdu

EPSS · scored 2026-10-27

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

cvss

Technical severity, 0–10. One row per scoring source.

6.1

010

base score 0–10 · higher = more severe · hover a vector to decode

v2.05.8mediumAV:N/AC:M/Au:N/C:P/I:P/A:Nprimary · NVD / NIST USexploitability 8.6 · impact 4.9

v3.16.1mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:Nprimary · NVD / NIST USexploitability 2.8 · impact 2.7

v3.16.1mediumAV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:Nsecondary · FSTEC (BDU) RU

v3.14.3mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:Nsecondary · ENISA EU

v3.14.3mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:Nsecondary · security@qnapsecurity.com.twexploitability 2.8 · impact 1.4

v3.15.6mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N/E:Usecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-601USprimaryCWE-601US

affected products (33)

Products and version ranges known to be affected.

QNAP Systems Inc. QTSunspecified → 4.5.4.1991 build 20220329enisa_euvdEU
QNAP Systems Inc. QTSunspecified → 5.0.0.1986 build 20220324enisa_euvdEU
QNAP Systems Inc. QuTS herounspecified → h4.5.4.1951 build 20220218enisa_euvdEU
QNAP Systems Inc. QuTS herounspecified → h5.0.0.1949 build 20220215enisa_euvdEU
QNAP Systems Inc. QuTScloudunspecified → c5.0.1.1949enisa_euvdEU
QNAP Systems, Inc. QTS≤ 4.2.6build 20190322fstec_bduRU
QNAP Systems, Inc. QTS≤ 4.2.6build 20170517fstec_bduRU
QNAP Systems, Inc. QTS≤ 4.2.6build 20211215fstec_bduRU
QNAP Systems, Inc. QTS≤ 4.2.6build 20210327fstec_bduRU
QNAP Systems, Inc. QTS≤ 4.2.6build 20200109fstec_bduRU
QNAP Systems, Inc. QTS≤ 4.2.6build 20191107fstec_bduRU
QNAP Systems, Inc. QTS≤ 4.2.6build 20190921fstec_bduRU
QNAP Systems, Inc. QTS≤ 4.2.6build 20190730fstec_bduRU
QNAP Systems, Inc. QTS≤ 4.2.6build 20200821fstec_bduRU
QNAP Systems, Inc. QTS≤ 4.2.6build 20200611fstec_bduRU
QNAP Systems, Inc. QTS≤ 4.2.6build 20200421fstec_bduRU
QNAP Systems, Inc. QTS4.3.3.0174 → 4.3.3.1945fstec_bduRU
QNAP Systems, Inc. QTS4.3.4.0899 → 4.3.4.1976fstec_bduRU
QNAP Systems, Inc. QTS4.3.6.0895 → 4.3.6.1965fstec_bduRU
QNAP Systems, Inc. QTS4.4.0.0883 → 4.5.4.1991fstec_bduRU

showing 20 of 33

also known as (4)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu NVD CVE.org MITRE

published 2022-05-05modified 2026-06-17

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references (5)

External citations — patches, advisories, analysis.

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