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CVE-2021-21726 Explained : Impact and Mitigation

Discover how CVE-2021-21726 impacts ZTE products like ZXONE 9700, 8700, 19700 with an input verification vulnerability. Learn about the technical details and mitigation strategies.

ZTE products including ZXONE 9700, ZXONE 8700, ZXONE 19700 are impacted by an input verification vulnerability in the diagnostic function interface, allowing attackers to disrupt processes by inputting malicious parameters.

Understanding CVE-2021-21726

This CVE highlights a vulnerability in ZTE products that can be exploited by attackers with high privileges.

What is CVE-2021-21726?

The CVE-2021-21726 involves an input verification flaw in ZTE products that can lead to process exceptions when unauthorized parameters are repeatedly inputted.

The Impact of CVE-2021-21726

The vulnerability allows attackers to disrupt processes, posing a risk to the integrity and availability of affected systems.

Technical Details of CVE-2021-21726

The technical aspects of the CVE include details on the vulnerability, affected systems, and the exploitation mechanism.

Vulnerability Description

Insufficient input validation in the diagnostic function interface of ZTE products enables attackers to cause process exceptions.

Affected Systems and Versions

ZXONE 9700, ZXONE 8700, ZXONE 19700 with versions V1.40.021.021CP049 and V1.0P02B219_@NCPM-RELEASE_2.40R1-20200914.set are impacted.

Exploitation Mechanism

Attackers with high privileges can exploit this vulnerability by inputting malicious parameters in the diagnostic function interface.

Mitigation and Prevention

To protect systems from CVE-2021-21726, immediate actions and long-term security practices are recommended.

Immediate Steps to Take

Organizations should apply security patches, monitor system logs for suspicious activities, and restrict access to the diagnostic function interface.

Long-Term Security Practices

Implementing secure coding practices, conducting regular security assessments, and providing cybersecurity awareness training can enhance overall security posture.

Patching and Updates

Regularly update ZTE products with the latest patches and firmware releases to mitigate the risk associated with CVE-2021-21726.

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