CVE-2026-17251 HIGH

CVE-2026-17251: Unauthenticated Denial of Service via Null Pointer Dereference in HTTP Request Parsing

Vendor Tp-Link Systems Inc.
Product TL-MR6400 v7.0
Weakness CWE-476
Published August 21, 2026
Last update August 21, 2026

CVSS base score

7.1/10
Attack vector Adjacent
Attack complexity Low
Privileges required None
User interaction None
Confidentiality
Integrity

CVSS vector

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

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

August 21, 2026 CVE published
August 21, 2026 Record updated