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Critical severity9.1NVD Advisory· Published Dec 31, 2020· Updated Jun 17, 2026

CVE-2018-19945

CVE-2018-19945

Description

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.

AI Insight

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Affected products

3
  • Qnap/Qts2 versions
    cpe:2.3:o:qnap:qts:*:*:*:*:*:*:*:*+ 1 more
    • cpe:2.3:o:qnap:qts:*:*:*:*:*:*:*:*range: >=4.3.4,<4.3.4.0899
    • (no CPE)range: 4.3.4 to 4.3.6 (prior to 4.3.6.0895 build 20190328 and 4.3.4.0899 build 20190322)
  • QNAP Systems Inc./QTSv5
    Range: 4.5.x

Patches

Vulnerability mechanics

References

1

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