CVE-2018-19957

mediumpriority · track · 24EPSS 0.007 · 53 %ileEUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

0.71% (53rd) EPSS

CVSS 4.3 · medium

Is it mine?

6 products

Check your exposure

Who says so?

3 sources

cnnvd · enisa_euvd · nvd

EPSS · scored 2026-10-28

A vulnerability involving insufficient HTTP security headers has been reported to affect QNAP NAS running QTS, QuTS hero, and QuTScloud. This vulnerability allows remote attackers to launch privacy and security attacks. We have already fixed this vulnerability in the following versions: QTS 4.5.4.1715 build 20210630 and later QuTS hero h4.5.4.1771 build 20210825 and later QuTScloud c4.5.6.1755 build 20210809 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

v2.04.3mediumAV:N/AC:M/Au:N/C:N/I:P/A:Nprimary · NVD / NIST USexploitability 8.6 · impact 2.9

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

v3.15.6mediumCVSS: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-1021USprimary

affected products (6)

Products and version ranges known to be affected.

QNAP Systems Inc. QTSunspecified → 4.5.4.1715 build 20210630enisa_euvdEU
QNAP Systems Inc. QuTS herounspecified → h4.5.4.1771 build 20210825enisa_euvdEU
QNAP Systems Inc. QuTScloudunspecified → c4.5.6.1755 build 20210809enisa_euvdEU
qnap qts< 4.5.4.1715nvdUScpe:2.3:o:qnap:qts:*:*:*:*:*:*:*:*
qnap quts hero< h4.5.4.1771nvdUScpe:2.3:o:qnap:quts_hero:*:*:*:*:*:*:*:*
qnap qutscloud< c4.5.6.1755nvdUScpe:2.3:o:qnap:qutscloud:*:*:*:*:*:*:*:*

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd nvd NVD CVE.org MITRE

published 2021-09-10modified 2026-06-17

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+516 more

references (6)

External citations — patches, advisories, analysis.

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