01 Record

CVE-2020-2509

Command Injection Vulnerability in QTS and QuTS hero

CriticalKEVPUBLISHEDCNA: qnap

CNA base score9.8 CVSS v3.xCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

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02 Description

Command Injection Vulnerability in QTS and QuTS hero

03 Exploitation and scoring

Exploitation

Exploited in the wild. Listed in the CISA Known Exploited Vulnerabilities catalog on 2022-04-11. Federal remediation due 2022-05-02.

SSVC decision

ExploitationactiveCISA reports credible evidence of active exploitation.
AutomatableyesAn attacker can reliably automate reconnaissance through exploitation, so this scales.
Technical ImpacttotalSuccessful exploitation gives total control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

33.98% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 98.3% of scored records. A rank, not a probability.

NVD base score

9.8 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

NVD analysis status

Analyzed. NVD last modified this record on 2026-06-17.

Red Hat severity

No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published

2021-04-17 03:50Z5 YR AGO

Last updated

2025-10-21 23:25Z1 YR AGO

Reserved

2019-12-09

Assigning CNA

qnap

Record state

PUBLISHED

Severity

Critical (CVSS 9.8)

CNA CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Weaknesses

CWE-77Improper Neutralization of Special Elements used in a Command ('Command Injection')Class
CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')Base

Data version

5.1

Document digest

6f360c95ae1b71bd4842e7828e3aa1c20cecc2b9e0b3f26d593119865771ce45

05 Affected products

VendorProductVersionsPlatforms

QNAP Systems Inc.QTS< 4.5.2.1566 Build 20210202, < 4.5.1.1495 Build 20201123, < 4.3.6.1620 Build 20210322, < 4.3.4.1632 Build 20210324, < 4.3.3.1624 Build 20210416, < 4.2.6 Build 20210327—

QNAP Systems Inc.QuTS hero< h4.5.1.1491 build 20201119—

06 References

www.qnap.comhttps://www.qnap.com/en/security-advisory/qsa-21-05x_refsource_MISC
www.cisa.govhttps://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-2509government-resource

07 Remediation

QNAP has 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