CVE-2021-38684: QNAP Multimedia Console

Critical severity, CVSS 9.8. EPSS: 1.3% chance of exploitation in the next 30 days.

A stack buffer overflow vulnerability has been reported to affect QNAP NAS running Multimedia Console. If exploited, this vulnerability allows attackers to execute arbitrary code. We have already fixed this vulnerability in the following versions of Multimedia Console: Multimedia Console 1.4.3 ( 2021/10/05 ) and later Multimedia Console 1.5.3 ( 2021/10/05 ) and later

Affected products

• QNAP Multimedia Console: before 1.4.3 (fixed in 1.4.3); version 1.5.2 only

Published 2021-11-13. Last modified 2026-06-17.