CVE record · CVE-2021-34343

Buffer Overflow Vulnerability in QTS, QuTS hero, and QuTScloud

CVSS 6.0 MediumEPSS 0.019 · 80th percentile

Published by the CVE Program (CNA: qnap) at 10 Sept 2021, 04:00 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it.

Affected products, as the CNA wrote them
Vendor	Product	Versions
QNAP Systems Inc.	QTS	affected unspecified to before 4.5.4.1715 build 20210630 custom affected unspecified to before 5.0.0.1716 build 20210701 custom
QNAP Systems Inc.	QuTScloud	affected unspecified to before c4.5.6.1755 custom
QNAP Systems Inc.	QuTS hero	affected unspecified to before h4.5.4.1771 build 20210825 custom

Identifiers: CVE-2021-34343
CNA: qnap
Weakness (CWE): CWE-787
Tags: QNAP Systems Inc. QTS
QNAP Systems Inc. QuTScloud
QNAP Systems Inc. QuTS hero
Memory corruption
Published: 10 Sept 2021
Updated: 16 Sept 2024

Not analysed yet

We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.

Severity and exploitation

Score	Rating	CVSS	Vector	Source
6.0	Medium	3.1	CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:H	CNA (qnap)

CISA KEV Not listed.
EPSS 0.019, the 80th percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

This record came from the full history of the CVE Program, published 10 Sept 2021. New records show when each source confirmed them.

Sources

References from the CNA

www.qnap.com/en/security-advisory/qsa-21-33

Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description.