Security Advisory: Unauthenticated Denial-of-Service Vulnerability in HTTP Service in Multiple TP-Link Routers (CVE-2026-8619)

Vulnerability and Impact Description:

CVE-2026-8619

An unauthenticated denial-of-service vulnerability was identified in certain TP-Link router products due to improper handling of exceptional request conditions that may lead to a NULL pointer dereference. A remote attacker on an adjacent network can send a specially crated HTTP request to trigger a crash of the HTTP service process.

Successful exploitation may cause the HTTP service to crash, making the web management interface and HTTP-dependent functionality temporarily unavailable.

CVSS v4.0 Score: 7.1 / High

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/Versions and Fixes:

Recommendations:

We strongly recommend that users with affected devices take the following actions:

1. Update affected devices to the latest firmware version that fixed the vulnerability:

EN: Download for Archer MR600 | TP-Link

Download for TL-MR100 | TP-Link

Download for TL-MR150 | TP-Link

Download for TL-MR6400 | TP-Link

Note: The above models are not sold in the U.S.

Disclaimer:

This advisory is provided for informational purposes only and is subject to change without notice. The information is provided “as is” without warranties of any kind. TP-Link recommends that customers promptly apply available firmware updates or implement documented workarounds as provided in this advisory. Devices/systems that are not updated or mitigated as described may remain vulnerable, and TP-Link disclaims any responsibility or liability for any damages or losses arising from a failure to implement such updates.