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Critical9.1QNAP

Critical [CVE-2018-19945] QTS: vulnerability has been reported to affect earlier QNAP devices running QTS 4.3.4 to 4.3.6.

This critical-severity QNAP advisory covers CVE-2018-19945 affecting QTS.

CVE-2018-19945 Published Dec 31, 2020Updated by vendor Jun 17, 2026
Affected products & platforms
QNAPQTS
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Summary

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.

Affected versions
  • 4.3.4

Official advisory · high-confidence parse· fetched 2 months ago·verify at source

Fixed versions

No fixed release is recorded yet. That does not prove no patch exists — confirm against the vendor advisory.

Official advisory · high-confidence parse· fetched 2 months ago·verify at source

Mitigation

The source record does not include mitigation steps. That is not a statement that no fix exists — read the vendor advisory below for the authoritative guidance.

Official advisory · high-confidence parse· fetched 2 months ago·verify at source

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