CVE-2026-17251highCWE-476

CVE-2026-17251: high-severity vulnerability in TP-Link Systems Inc. TL-MR6400 v7.0

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

Published

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21Vexday Risk Score

No sign of exploitation. No public exploitation artifact known so far.

ssvc Trackcvss 7.1epss 0.5%
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.
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
Affected products
TP-Link Systems Inc. · TL-MR6400 v7.0
Related CVEs — TP-Link Systems Inc. TL-MR6400 v7.0

In the same product, most dangerous first.

CVE-2026-17250HIGHAuthenticated Remote Code Execution via Stack-Based Buffer Overflow in Firmware Update HandlingEPSS 0.3%CVE-2026-17252HIGHUnauthenticated Denial of Service via Composed HTTP Parsing and Stack-Based Out-of-Bounds Write Vulnerability in TL-MR6400 Web Management InterfaceEPSS 0.3%