CVE-2021-38686: QNAP Qvr

High severity, CVSS 8.8. EPSS: 1% chance of exploitation in the next 30 days.

An improper authentication vulnerability has been reported to affect QNAP device, VioStor. If exploited, this vulnerability allows attackers to compromise the security of the system. We have already fixed this vulnerability in the following versions of QVR: QVR FW 5.1.6 build 20211109 and later

Affected products

• QNAP Qvr: before 5.1.6 (fixed in 5.1.6)

Published 2021-11-26. Last modified 2026-06-17.