TP-Link TL-WR841N Web Portal Null Pointer Dereference Vulnerability Leading to Denial-of-Service

A null pointer dereference vulnerability has been identified in the web portal of the TP-Link TL-WR841N router, specifically in version 14 prior to 250908. This vulnerability arises from inadequate input validation in the referer header check, allowing remote, unauthenticated attackers to exploit the flaw and cause a denial-of-service condition on the web portal service.

Impact

Exploitation of this vulnerability leads to a denial-of-service condition on the web portal service, causing it to become unresponsive or unavailable.

Remediation

Users are advised to upgrade to the latest firmware version 250908 or later. The firmware can be downloaded from the TP-Link support website for the respective region.