Is CVE-2021-38692 actively exploited?

No active exploitation of CVE-2021-38692 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2021-38692 be exploited remotely?

Yes. CVE-2021-38692 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2021-38692?

CVE-2021-38692 has a CVSS score of 9.8 (CRITICAL).

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CRITICAL

CVE-2021-38692

CWE-120Published: January 14, 2022· Updated: Jun 17, 2026

9.8

CVSS v3.1

Official Description

A stack buffer overflow vulnerability has been reported to affect QNAP device running QVR Elite, QVR Pro, QVR Guard. If exploited, this vulnerability allows attackers to execute arbitrary code. We have already fixed this vulnerability in the following versions of QVR Elite, QVR Pro, QVR Guard: QuTS hero h5.0.0: QVR Elite 2.1.4.0 (2021/12/06) and later QuTS hero h4.5.4: QVR Elite 2.1.4.0 (2021/12/06) and later QTS 5.0.0: QVR Elite 2.1.4.0 (2021/12/06) and later QTS 4.5.4: QVR Elite 2.1.4.0 (2021/12/06) and later QTS 4.5.4: QVR Pro 2.1.3.0 (2021/12/06) and later QTS 5.0.0: QVR Pro 2.1.3.0 (2021/12/06) and later QTS 4.5.4: QVR Guard 2.1.3.0 (2021/12/06) and later QTS 5.0.0: QVR Guard 2.1.3.0 (2021/12/06) and later

NVD Source

Technical Analysis

CVE-2021-38692 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.