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CVE-2021-21740

2.4 · LOW

There is an information leak vulnerability in the digital media player (DMS) of ZTE's residential gateway product.

Published Aug 9, 2021CWE-59EPSS 0.44%

Overview

CVE-2021-21740 is a low-severity vulnerability. It was published on August 9, 2021 and has a CVSS 3.1 base score of 2.4 (LOW).

This vulnerability has a CVSS 3.1 base score of 2.4, rated LOW. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.

Technical description

There is an information leak vulnerability in the digital media player (DMS) of ZTE's residential gateway product. The attacker could insert the USB disk with the symbolic link into the residential gateway, and access unauthorized directory information through the symbolic link, causing information leak.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refsupport.zte.com.cn/support/news/LoopholeInfoDetail.aspx?newsId=1017244Refsupport.zte.com.cn/support/news/LoopholeInfoDetail.aspx?newsId=1017244

How CyberStrike helps

Frequently asked questions

What is CVE-2021-21740?

CVE-2021-21740 is a low-severity vulnerability. It was published on August 9, 2021 and has a CVSS 3.1 base score of 2.4 (LOW).

How severe is CVE-2021-21740?

This vulnerability has a CVSS 3.1 base score of 2.4, rated LOW. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2021-21740?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2021-21740?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2021-21740 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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