CVE-2025-66281

No fix known EPSS <1%CVSS 6.9

A NULL pointer dereference vulnerability has been reported to affect several QNAP operating system versions. The remote attackers can then exploit the vulnerability to launch a denial-of-service (DoS) attack. We have already fixed the vulnerability in the following versions: QTS 5.2.9.3410 build 20260214 and later QuTS hero h5.2.9.3410 build 20260214 and later QuTS hero h5.3.4.3500 build 20260520 and later QuTS hero h6.0.0.3397 build 20260206 and later

Published 2026-06-10 · CVE record · OSV

Products: QNAP Systems Inc. QTS, QNAP Systems Inc. QuTS hero