CVE record · CVE-2020-2509

Command Injection Vulnerability in QTS and QuTS hero

CVSS 9.8 CriticalCriticalIn CISA KEVEPSS 0.34 · 98th percentile

Critical, because:

In CISA’s KEV catalogue since 11 Apr 2022: it is known to be exploited.
CVSS score 9.8: 9.0 or more.
CVSS score 9.8 (7.0 or more) and EPSS 0.34 (0.1 or more): a high score and a real chance of exploitation in the next 30 days.

Published by the CVE Program (CNA: qnap) at 17 Apr 2021, 03:50 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 4.5.2.1566 Build 20210202 custom affected unspecified to before 4.5.1.1495 Build 20201123 custom affected unspecified to before 4.3.6.1620 Build 20210322 custom affected unspecified to before 4.3.4.1632 Build 20210324 custom affected unspecified to before 4.3.3.1624 Build 20210416 custom affected unspecified to before 4.2.6 Build 20210327 custom
QNAP Systems Inc.	QuTS hero	affected unspecified to before h4.5.1.1491 build 20201119 custom

Identifiers: CVE-2020-2509
CNA: qnap
Weakness (CWE): CWE-77 · CWE-78
Tags: QNAP Systems Inc. QTS
QNAP Systems Inc. QuTS hero
Command injection
Published: 17 Apr 2021
Updated: 21 Oct 2025

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
9.8	Critical	3.1	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H	ADP (CISA-ADP)

CISA KEV Listed since 11 Apr 2022: known to be exploited.
EPSS 0.34, the 98th 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 17 Apr 2021. New records show when each source confirmed them.

Sources

References from the CNA

www.qnap.com/en/security-advisory/qsa-21-05

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.