A stack buffer overflow vulnerability has been reported to affect QNAP device running QTS QuTScloud QuTS hero. If exploited this vulnerability allows attackers to execute arbitrary code. We have already fixed this vulnerability in the following versions of QTS QuTScloud QuTS hero: QTS 4.5.4.1715 build 20210630 and later QTS 5.0.0.1716 build 20210701 and later QTS 4.3.3.1693 build 20210624 and later QTS 4.3.6.1750 build 20210730 and later QuTScloud c4.5.6.1755 and later QuTS hero h4.5.4.1771 build 20210825 and later