CVE-2018-19945

highpriority · track · 36EPSS 0.011 · 66 %ileEUUS

grimoire priorityP2 · Scheduled

Exploitable?

—

no known exploitation

Likely / severe?

1.12% (66th) EPSS

CVSS 8.5 · high

Is it mine?

4 products

Check your exposure

Who says so?

3 sources

cnnvd · enisa_euvd · nvd

EPSS · scored 2026-10-27

A vulnerability has been reported to affect earlier QNAP devices running QTS 4.3.4 to 4.3.6. Caused by improper limitations of a pathname to a restricted directory, this vulnerability allows for renaming arbitrary files on the target system, if exploited. QNAP have already fixed this vulnerability in the following versions: QTS 4.3.6.0895 build 20190328 (and later) QTS 4.3.4.0899 build 20190322 (and later) This issue does not affect QTS 4.4.x or QTS 4.5.x.

cvss

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

9.1

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · high–critical · 8.3–9.1

v2.08.5highAV:N/AC:L/Au:N/C:N/I:P/A:Cprimary · NVD / NIST USexploitability 10 · impact 7.8

v3.19.1criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:Hprimary · NVD / NIST USexploitability 3.9 · impact 5.2

v3.18.3highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H/E:Usecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-22USprimaryCWE-20USCWE-284USCWE-73US

affected products (4)

Products and version ranges known to be affected.

QNAP Systems Inc. QTSunspecified → 4.3.4.0899enisa_euvdEU
QNAP Systems Inc. QTSunspecified → 4.3.6.0895enisa_euvdEU
qnap qts4.3.4 → 4.3.4.0899nvdUScpe:2.3:o:qnap:qts:*:*:*:*:*:*:*:*
qnap qts4.3.5 → 4.3.6.0895nvdUScpe:2.3:o:qnap:qts:*:*:*:*:*:*:*:*

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 2020-12-31modified 2026-06-17

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+12523 more

references (4)

External citations — patches, advisories, analysis.

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