CVE-2021-38692: QNAP Qvr Elite

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 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

Affected products

• QNAP Qvr Elite: before 2.1.4.0 (fixed in 2.1.4.0)
• QNAP Qvr Guard: before 2.1.3.0 (fixed in 2.1.3.0)
• QNAP Qvr Pro: before 2.1.3.0 (fixed in 2.1.3.0)

Published 2022-01-14. Last modified 2026-06-17.