CVE-2026-17252

A stack-based out-of-bounds write vulnerability exists in the login request handling functionality of the administrative web interface of TP-Link TL-MR6400 v7 routers. An unauthenticated adjacent attacker can trigger the vulnerability by sending a specially crafted malformed HTTP request. Successful exploitation may cause the web service process to crash, resulting in a denial-of-service condition and temporary loss of access to the router's web management interface.

CVSS 4.0

7.1CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

EPSS

0.3% chance of exploitation in the next 30 days; higher than 18% of CVEs (scores of 2026-10-25)

CWE

CWE-787

Published

2026-08-21

Modified

2026-10-14

Record from

the NVD, synced 2026-10-19

References

• https://www.tp-link.com/en/support/download/tl-mr6400/v7/#Firmware
• https://www.tp-link.com/tw/support/download/tl-mr6400/v7/#Firmware
• https://www.tp-link.com/us/support/faq/5259/

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