What is CVE-2021-21728?

CVE-2021-21728 is a configuration error vulnerability in a ZTE product that allows an attacker to consume system processing resources by flooding a certain port with a large number of packets.

How does CVE-2021-21728 affect ZTE Zxa10 C300m Firmware?

CVE-2021-21728 affects ZTE Zxa10 C300m Firmware versions up to but not including 4.5, allowing an attacker to reduce the system's processing capabilities by exploiting the vulnerability.

What is the severity level of CVE-2021-21728?

CVE-2021-21728 has a severity level of 5.3 (medium).

How can I fix CVE-2021-21728 in ZTE Zxa10 C300m Firmware?

To fix CVE-2021-21728 in ZTE Zxa10 C300m Firmware, update to the latest version (4.5 or higher) which contains a fix for the vulnerability.

Where can I find more information about CVE-2021-21728?

You can find more information about CVE-2021-21728 in ZTE's official advisory at [link](https://support.zte.com.cn/support/news/LoopholeInfoDetail.aspx?newsId=1014784).

Vulnerability/
CVE-2021-21728

medium

5.3

CWE

400

9/4/2021

3/8/2024

CVE-2021-21728

First published: Fri Apr 09 2021(Updated: )

A ZTE product has a configuration error vulnerability. Because a certain port is open by default, an attacker can consume system processing resources by flushing a large number of packets to the port, and successfully exploiting this vulnerability could reduce system processing capabilities. This affects: ZXA10 C300M all versions up to V4.3P8.

Credit: psirt@zte.com.cn

Affected Software	Affected Version	How to fix
Zte Zxa10 C300m Firmware	<4.5
Zte Zxa10 C300m

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Reference Links

https://support.zte.com.cn/support/news/LoopholeInfoDetail.aspx?newsId=1014784

Frequently Asked Questions

What is CVE-2021-21728?
CVE-2021-21728 is a configuration error vulnerability in a ZTE product that allows an attacker to consume system processing resources by flooding a certain port with a large number of packets.
How does CVE-2021-21728 affect ZTE Zxa10 C300m Firmware?
CVE-2021-21728 affects ZTE Zxa10 C300m Firmware versions up to but not including 4.5, allowing an attacker to reduce the system's processing capabilities by exploiting the vulnerability.
What is the severity level of CVE-2021-21728?
CVE-2021-21728 has a severity level of 5.3 (medium).
How can I fix CVE-2021-21728 in ZTE Zxa10 C300m Firmware?
To fix CVE-2021-21728 in ZTE Zxa10 C300m Firmware, update to the latest version (4.5 or higher) which contains a fix for the vulnerability.
Where can I find more information about CVE-2021-21728?
You can find more information about CVE-2021-21728 in ZTE's official advisory at [link](https://support.zte.com.cn/support/news/LoopholeInfoDetail.aspx?newsId=1014784).

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vendor/zte
canonical/zte zxa10 c300m firmware
canonical/zte zxa10 c300m

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