CVE-2018-19945

9.1 criticalEPSS 1.1%

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.

Severity

CVSS 3.1

9.1 critical

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H

EPSS: 1.1% chance of exploitation in the next 30 days; higher than 66% of CVEs (scores of 2026-10-31)
CWEs: CWE-22, CWE-20, CWE-73, CWE-284
Published: 2020-12-31
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

qnap:qts

References

https://www.qnap.com/zh-tw/security-advisory/qsa-20-21
https://www.qnap.com/zh-tw/security-advisory/qsa-20-21

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