CVE-2021-21740

Name: CVE-2021-21740
Creator: NVD / NIST
Published: 2021-08-09T16:15:07.037+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

LOWCVSS 2.4/10EPSS 0.44%

Last modified Jun 17, 2026

CVE-2021-21740 is a low-severity vulnerability rated 2.4/10 on the CVSS scale. 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.. EPSS estimates a 0.44% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

2.4/10

CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

EPSS Probability

0.44%

35.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-59

Affected Software

Vendor	Product	Versions
Zte	Zxhn H2640 Firmware	10.0.0c6_ty

References

https://support.zte.com.cn/support/news/LoopholeInfoDetail.aspx?newsId=1017244Vendor Advisory
https://support.zte.com.cn/support/news/LoopholeInfoDetail.aspx?newsId=1017244Vendor Advisory

Timeline

Published: Aug 9, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-21740?

How severe is CVE-2021-21740?

CVE-2021-21740 has a CVSS score of 2.4/10 (LOW severity). The EPSS model estimates a 0.44% probability of exploitation in the next 30 days.

How do I fix CVE-2021-21740?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-21740?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST