The response coming from TP-Link Archer MR200 v5.2, C20 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.
https://www.tp-link.com/us/support/faq/4948/
https://www.tp-link.com/in/support/download/tl-wr850n/#Firmware
https://www.tp-link.com/in/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/en/support/download/tl-wr845n/#Firmware
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
Published: 2026-02-05
Updated: 2026-02-12
Base Score: 5.1
Vector: CVSS2#AV:N/AC:H/Au:N/C:P/I:P/A:P
Severity: Medium
Base Score: 5.6
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L
Severity: Medium
Base Score: 5.9
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
Severity: Medium
EPSS: 0.00027