CVE-2021-27246: TP-Link AC1750 Firmware

High severity, CVSS 8.0. EPSS: 6.6% chance of exploitation in the next 30 days.

This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of TP-Link Archer A7 AC1750 1.0.15 routers. Authentication is not required to exploit this vulnerability. The specific flaw exists within the handling of MAC addresses by the tdpServer endpoint. A crafted TCP message can write stack pointers to the stack. An attacker can leverage this vulnerability to execute code in the context of the root user. Was ZDI-CAN-12306.

Affected products

• TP-Link AC1750 Firmware: version 1.0.15 only

Published 2021-04-14. Last modified 2026-06-17.