What’s Vulnerable › Vulnerabilities

CVE-2021-38684: Buffer Overflow Vulnerability in Multimedia Console

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-11-13 · updated 2026-06-17
• Weakness: CWE-787

Description

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 Systems Inc. Multimedia Console: before 1.4.3; 1.5.2 — fixed in 1.4.3

How to fix

Upgrade to a fixed version: QNAP Systems Inc. Multimedia Console 1.4.3. Check the vendor advisory for mitigations.

References

• https://www.qnap.com/en/security-advisory/qsa-21-45
• https://www.qnap.com/en/security-advisory/qsa-21-45

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