ZDI-CAN-9663: (Pwn2Own) TP-Link Archer A7 Protection Mechanism Failure Firewall Bypass Vulnerability

This vulnerability allows a firewall bypass on affected installations of TP-Link Archer A7 AC1750 routers. Authentication is not required to exploit this vulnerability. The specific flaw exists within the handling of IPv6 connections. The issue results from the lack of proper filtering of IPv6 SSH connections. An attacker can leverage this in conjunction with other vulnerabilities to execute code in the context of root.

Affected Software

1 affected component
TP-Link Archer A7

Event History

Feb 23, 2026
Advisory Published
via ZDI·06:25 PM
Data Sourced
via ZDI·06:25 PM
DescriptionSeverityAffected Software

Frequently Asked Questions

1

What is the severity of ZDI-CAN-9663?

The severity of ZDI-CAN-9663 is considered high due to the potential for unauthorized access and firewall bypass.

2

How do I fix ZDI-CAN-9663?

To fix ZDI-CAN-9663, update the firmware of the TP-Link Archer A7 AC1750 router to the latest version provided by TP-Link.

3

What types of devices are affected by ZDI-CAN-9663?

ZDI-CAN-9663 specifically affects TP-Link Archer A7 AC1750 routers that have not been updated to a secure firmware version.

4

Is authentication required to exploit ZDI-CAN-9663?

No, authentication is not required to exploit ZDI-CAN-9663, making it easier for attackers to take advantage of the vulnerability.

5

What does ZDI-CAN-9663 allow an attacker to do?

ZDI-CAN-9663 allows an attacker to bypass the firewall on the affected TP-Link Archer A7 AC1750 routers.

Contact

SecAlerts Pty Ltd.
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Fortitude Valley,
QLD 4006, Australia
info@secalerts.co
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