What’s Vulnerable › Vulnerabilities

CVE-2021-34344: Stack Buffer Overflow Vulnerability in QUSBCam2

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.6% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-09-10 · updated 2026-06-17
• Weakness: CWE-787

Description

A stack buffer overflow vulnerability has been reported to affect QNAP device running QUSBCam2. If exploited, this vulnerability allows attackers to execute arbitrary code. We have already fixed this vulnerability in the following versions of QUSBCam2: QTS 4.5.4: QUSBCam2 1.1.4 ( 2021/07/30 ) and later QTS 5.0: QUSBCam2 2.0.1 ( 2021/08/03 ) and later QTS 4.3.6: QUSBCam2 1.1.4 ( 2021/07/30 ) and later QTS 4.3.3: QUSBCam2 1.1.4 ( 2021/08/06 ) and later QuTS hero 4.5.3: QUSBCam2 1.1.4 ( 2021/07/30 ) and later

Affected products

• QNAP Systems Inc. QUSBCam2: before 1.1.4 — fixed in 1.1.4

How to fix

Upgrade to a fixed version: QNAP Systems Inc. QUSBCam2 1.1.4. Check the vendor advisory for mitigations.

References

• https://www.qnap.com/en/security-advisory/qsa-21-34
• https://www.qnap.com/en/security-advisory/qsa-21-34

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