title: Buffer Overflow Vulnerability in QTS, QuTS hero, and QuTScloud
description: 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 QuTScloud c4.5.6.1755 and later QuTS hero h4.5.4.1771 build 20210825 and later
problem types: CWE-787 Out-of-bounds Write
affected:
{
product: QTS
vendor: QNAP Systems Inc.
versions:
lessThan: 4.5.4.1715 build 20210630, status: affected, version: unspecified, versionType: custom
lessThan: 5.0.0.1716 build 20210701, status: affected, version: unspecified, versionType: custom
}
{
product: QuTScloud
vendor: QNAP Systems Inc.
versions:
lessThan: c4.5.6.1755, status: affected, version: unspecified, versionType: custom
}
{
product: QuTS hero
vendor: QNAP Systems Inc.
versions:
lessThan: h4.5.4.1771 build 20210825, status: affected, version: unspecified, versionType: custom
}
metrics:
cvssV3_1: [
attackComplexity: LOW
attackVector: NETWORK
availabilityImpact: HIGH
baseScore: 6
baseSeverity: MEDIUM
confidentialityImpact: LOW
integrityImpact: LOW
privilegesRequired: HIGH
scope: UNCHANGED
userInteraction: NONE
vectorString: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:H
version: 3.1
]
solutions: 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
QuTScloud c4.5.6.1755 and later
QuTS hero h4.5.4.1771 build 20210825 and later