Cyber Resilience

CVE-2021-34344

Critical

Published: 10 September 2021

Published
10 September 2021
Modified
21 November 2024
KEV Added
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Patch
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CVSS Score v3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS Score 0.0055 68.3th percentile
Risk Priority 20 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2021-34344 is a critical-severity Out-of-bounds Write (CWE-787) vulnerability in Qnap Qts. Its CVSS base score is 9.8 (Critical).

Operationally, ranked in the top 31.7% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.

EU & UK References

Vulnerability details

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…

more

( 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

CWE(s)
CWE-787

Related Threats

No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.

Affected Assets

qnap
qusbcam2
≤ 1.1.4

Mitigating Controls

Likely Mitigating Controls AI

Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.

SI-16 Memory Protection
addresses: CWE-787

Out-of-bounds writes that corrupt control flow or inject shellcode are rendered non-executable by the same memory protections.

References