# CVE-2020-2509: Command Injection Vulnerability in QTS and QuTS hero

> CVE-2020-2509: Command Injection Vulnerability in QTS and QuTS hero. CVSS 9.8 (CVSS 3.1), in CISA KEV.

Canonical: https://rewindex.com/cve/CVE-2020-2509
Last updated: 2025-10-21T23:25:49Z

- Published: 2021-04-17 03:50 UTC · Updated: 2025-10-21 23:25 UTC · Assigner: qnap
- CVSS: 9.8 (CVSS 3.1) · Severity: Critical · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS: 34.0%, 98th percentile (scored 2026-10-25)
- CISA KEV: yes, added 2022-04-11, federal due date 2022-05-02, ransomware use: Unknown
- CWE: CWE-77, CWE-78

## 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

## CISA required action

Apply updates per vendor instructions.

## Affected vendors and products

- QNAP Systems Inc.: QTS
- QNAP Systems Inc.: QuTS hero

## References

- [CVE record on cve.org](https://www.cve.org/CVERecord?id=CVE-2020-2509)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2020-2509)
- [https://www.qnap.com/en/security-advisory/qsa-21-05](https://www.qnap.com/en/security-advisory/qsa-21-05)

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_Sources: CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (https://www.cve.org/) This product uses data from the NVD API but is not endorsed or certified by the NVD. (https://nvd.nist.gov/) Known Exploited Vulnerabilities catalog from CISA. (https://www.cisa.gov/known-exploited-vulnerabilities-catalog) EPSS scores from FIRST (Exploit Prediction Scoring System). (https://www.first.org/epss/)_


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Canonical: https://rewindex.com/cve/CVE-2020-2509 · Markdown: https://rewindex.com/cve/CVE-2020-2509.md · JSON: https://rewindex.com/api/v1/cves/CVE-2020-2509 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-26T03:11:21.229Z