CVE-2018-19943

lowpriority · act · 90OT risk · criticalKEV · exploitedEPSS 0.227 · 98 %ileEURUUS

grimoire priorityP0 · Act now

Exploitable?

Yes · in the wild

CISA KEV

Likely / severe?

22.7% (98th) EPSS

CVSS 3.5 · low

Is it mine?

29 products

Check your exposure

Who says so?

3 sources

cnnvd · enisa_euvd · fstec_bdu

added 2022-05-24remediate by 2022-06-14

required action Apply updates per vendor instructions.

EPSS · scored 2026-10-26

QNAP NAS File Station Cross-Site Scripting Vulnerability

If exploited, this cross-site scripting vulnerability could allow remote attackers to inject malicious code. QNAP has already fixed these issues in the following QTS versions. QTS 4.4.2.1270 build 20200410 and later QTS 4.4.1.1261 build 20200330 and later QTS 4.3.6.1263 build 20200330 and later QTS 4.3.4.1282 build 20200408 and later QTS 4.3.3.1252 build 20200409 and later QTS 4.2.6 build 20200421 and later

cvss

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

8.0

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · low–high · 3.5–8

v2.03.5lowAV:N/AC:M/Au:S/C:N/I:P/A:Nprimary · NVD / NIST USexploitability 6.8 · impact 2.9

v3.15.4mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:Nprimary · NVD / NIST USexploitability 2.3 · impact 2.7

v3.15.4mediumAV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:Nsecondary · FSTEC (BDU) RU

v3.18highCVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:Hsecondary · ENISA EU

v3.18highCVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:Hsecondary · security@qnapsecurity.com.twexploitability 1.3 · impact 6

v3.15.4mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N/E:Hsecondary · CVSS-BT (t0sche)

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Exploitation: active · Automatable: no · Technical Impact: totalcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-79USprimaryCWE-79USCWE-80US

affected products (29)

Products and version ranges known to be affected.

QNAP Systems Inc. QTSunspecified → 4.2.6enisa_euvdEU
QNAP Systems Inc. QTSunspecified → 4.3.3.1252enisa_euvdEU
QNAP Systems Inc. QTSunspecified → 4.3.4.1282enisa_euvdEU
QNAP Systems Inc. QTSunspecified → 4.3.6.1263enisa_euvdEU
QNAP Systems Inc. QTSunspecified → 4.4.1.1261enisa_euvdEU
QNAP Systems Inc. QTSunspecified → 4.4.2.1270enisa_euvdEU
QNAP Systems, Inc. QTS≤ 4.2.6-fstec_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. 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 20190322fstec_bduRU
QNAP Systems, Inc. QTS≤ 4.2.6build 20170517fstec_bduRU
QNAP Systems, Inc. QTS≤ 4.2.6fstec_bduRU
QNAP Systems, Inc. QTS4.3.1.0013 → 4.3.3.1252fstec_bduRU
QNAP Systems, Inc. QTS4.3.4 → 4.3.4.1282fstec_bduRU
QNAP Systems, Inc. QTS4.3.6 → 4.3.6.1263fstec_bduRU

showing 20 of 29

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 2020-10-28modified 2026-08-13

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+52938 more

references (6)

External citations — patches, advisories, analysis.

scry

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