CVE-2021-34345: QNAP EJ1600 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 EJ1600 Firmware: before 1.0.6 (fixed in 1.0.6)
• QNAP Tl-d1600s Firmware: before 1.0.6 (fixed in 1.0.6)
• QNAP Tl-d400s Firmware: before 1.0.6 (fixed in 1.0.6)
• QNAP Tl-d800c Firmware: before 1.0.6 (fixed in 1.0.6)
• QNAP Tl-d800s Firmware: before 1.0.6 (fixed in 1.0.6)
• QNAP Tl-r1200c-Rp Firmware: before 1.0.6 (fixed in 1.0.6)
• QNAP Tl-r1200s-Rp Firmware: before 1.0.6 (fixed in 1.0.6)
• QNAP Tl-r1220sep-Rp Firmware: before 1.0.6 (fixed in 1.0.6)
• QNAP Tl-r1620sdc Firmware: before 1.0.6 (fixed in 1.0.6)
• QNAP Tl-r1620sep-Rp Firmware: before 1.0.6 (fixed in 1.0.6)
• QNAP Tl-r400s Firmware: before 1.0.6 (fixed in 1.0.6)
• QNAP Tr-002 Firmware: before 1.0.6 (fixed in 1.0.6)
• QNAP Tr-004 Firmware: before 1.0.6 (fixed in 1.0.6)
• QNAP Tr-004u Firmware: before 1.0.6 (fixed in 1.0.6)

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