What is CVE-2021-28800?

CVE-2021-28800 is a command injection vulnerability that affects QNAP NAS devices running legacy versions of QTS.

What is the severity of CVE-2021-28800?

The severity of CVE-2021-28800 is critical with a severity value of 9.8.

What software is affected by CVE-2021-28800?

QNAP NAS devices running QTS versions prior to 4.3.6.1663 Build 20210504 are affected by CVE-2021-28800.

How can CVE-2021-28800 be exploited?

CVE-2021-28800 can be exploited by attackers to execute arbitrary commands in a compromised application.

How can I fix CVE-2021-28800?

To fix CVE-2021-28800, update QTS to version 4.3.6.1663 Build 20210504 or later.

Vulnerability/
CVE-2021-28800

critical

9.8

CWE

78 77

24/6/2021

3/8/2024

CVE-2021-28800: Command Injection Vulnerability in QTS

First published: Thu Jun 24 2021(Updated: )

A command injection vulnerability has been reported to affect QNAP NAS running legacy versions of QTS. If exploited, this vulnerability allows attackers to execute arbitrary commands in a compromised application. This issue affects: QNAP Systems Inc. QTS versions prior to 4.3.6.1663 Build 20210504; versions prior to 4.3.3.1624 Build 20210416. This issue does not affect: QNAP Systems Inc. QTS 4.5.3. QNAP Systems Inc. QuTS hero h4.5.3. QNAP Systems Inc. QuTScloud c4.5.5.

Credit: security@qnapsecurity.com.tw

Affected Software	Affected Version	How to fix
QNAP QTS	<4.3.3.1624
QNAP QTS	>=4.3.4<4.3.6.1663

Remedy

QNAP have already fixed this vulnerability in the following versions: QTS 4.3.6.1663 Build 20210504 and later QTS 4.3.3.1624 Build 20210416 and later

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Reference Links

https://www.qnap.com/zh-tw/security-advisory/qsa-21-28

Frequently Asked Questions

What is CVE-2021-28800?
CVE-2021-28800 is a command injection vulnerability that affects QNAP NAS devices running legacy versions of QTS.
What is the severity of CVE-2021-28800?
The severity of CVE-2021-28800 is critical with a severity value of 9.8.
What software is affected by CVE-2021-28800?
QNAP NAS devices running QTS versions prior to 4.3.6.1663 Build 20210504 are affected by CVE-2021-28800.
How can CVE-2021-28800 be exploited?
CVE-2021-28800 can be exploited by attackers to execute arbitrary commands in a compromised application.
How can I fix CVE-2021-28800?
To fix CVE-2021-28800, update QTS to version 4.3.6.1663 Build 20210504 or later.

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