CVE-2026-17251

UNKNOWN 0.0

Unauthenticated Denial of Service via Null Pointer Dereference in HTTP Request Parsing

CVSS Score

0.0

EPSS Score

0.0%

EPSS Percentile

0th

A NULL pointer dereference vulnerability exists in the HTTP request parsing functionality of TL-MR6400 v7. An unauthenticated remote attacker can trigger the vulnerability by sending a specially crafted HTTP request containing a malformed session cookie header. Successful exploitation may cause the HTTP service process to crash, resulting in a denial-of-service condition and temporary loss of management or CGI functionality until service recovery.

CWE	CWE-476
Vendor	tp-link systems inc.
Product	tl-mr6400 v7.0
Published	Aug 21, 2026
Last Updated	Aug 21, 2026

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Affected Versions

TP-Link Systems Inc. / TL-MR6400 v7.0

0 < 1.9.0 Build 260714

References

NVD ↗ CVE.org ↗ EPSS Data ↗

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

Credits

Rui Cheng Yu (Hina)