CVE-2021-34346: QNAP NVR Storage Expansion Firmware

Critical severity, CVSS 9.8. EPSS: 1.6% chance of exploitation in the next 30 days.

A stack buffer overflow vulnerability has been reported to affect QNAP device running NVR Storage Expansion. If exploited, this vulnerability allows attackers to execute arbitrary code. We have already fixed this vulnerability in the following versions of NVR Storage Expansion: NVR Storage Expansion 1.0.6 ( 2021/08/03 ) and later

Affected products

• QNAP NVR Storage Expansion Firmware: before 1.0.6 (fixed in 1.0.6)

Published 2021-09-10. Last modified 2026-06-17.