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CVE-2020-2509

QNAP Network-Attached Storage (NAS) Command Injection

9.8 CRITICALActively exploited (CISA KEV)EPSS 34.0%
  1. Published17 Apr 2021
  2. Added to CISA KEV11 Apr 2022
  3. Remediation due2 May 2022
Actively exploited (CISA KEV)

QNAP NAS devices contain a command injection vulnerability which could allow attackers to perform remote code execution.

Added to KEV: 11 Apr 2022Federal remediation due: 2 May 2022

Description

A command injection vulnerability has been reported to affect QTS and QuTS hero. If exploited, this vulnerability allows attackers to execute arbitrary commands in a compromised application. We have already fixed this vulnerability in the following versions: QTS 4.5.2.1566 Build 20210202 and later QTS 4.5.1.1495 Build 20201123 and later QTS 4.3.6.1620 Build 20210322 and later QTS 4.3.4.1632 Build 20210324 and later QTS 4.3.3.1624 Build 20210416 and later QTS 4.2.6 Build 20210327 and later QuTS hero h4.5.1.1491 build 20201119 and later

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

QNAP Qts≥ 4.3.5 < 4.3.6 · ≥ 4.4.0 < 4.5.1 · < 4.2.6 · 4.2.6
QNAP Quts Hero< h4.5.1 · h4.5.1 · h4.5.1.1472

Remediation

Fixed in
QNAP Qts≥ 4.3.6
QNAP Quts Hero≥ h4.5.1

References

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Frequently asked

Is CVE-2020-2509 being actively exploited?

Yes. CVE-2020-2509 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added 11 Apr 2022.

How severe is CVE-2020-2509?

CVE-2020-2509 has a CVSS 3.1 base score of 9.8, rated critical. EPSS estimates a 34.0% probability of exploitation.

Which products are affected by CVE-2020-2509?

Affected products include QNAP Qts, QNAP Quts Hero.

How do I fix CVE-2020-2509?

Upgrade affected software to a fixed version, for example QNAP Qts 4.3.6, QNAP Quts Hero h4.5.1 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2020-2509 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. Because it is on the CISA KEV list, Secuno flags any affected asset as top-priority automatically. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.