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Findings

CVE-2020-2509

QNAP Network-Attached Storage (NAS) Command Injection Vulnerability

Published Apr 16, 2021 · updated Jun 16, 2026 · qnap qts

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

Timeline

Detection, updates, and resolution for this record.

  1. Apr 16, 2021 · Catalog

    Detected

    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

  2. Apr 11, 2022 · CISA KEV

    Known exploited

    Apply updates per vendor instructions.

  3. May 2, 2022 · CISA KEV

    Remediation due

    Apply updates per vendor instructions.

  4. Jun 16, 2026 · Catalog

    Updated

    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

Required action

Apply updates per vendor instructions.

CISA due date May 2, 2022

Affected

  • cpe qnap/qtsversion unspecified
  • cpe qnap/qts4.2.6
  • vendor QNAP QNAP Network-Attached Storage (NAS)version unspecified

Sources

  • CISA KEVCVE-2020-2509

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

    cisa.gov
  • CVE.orgCVE-2020-2509

    Official CVE identifier

    cve.org
  • FIRST EPSSCVE-2020-2509

    30-day exploitation probability 34.0%

    first.org
  • NIST NVDCVE-2020-2509

    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

    nvd.nist.gov

References

CVE-2020-2509 · ZeroDay Findings