Advisory Published
Advisory Published

ZDI-23-544: D-Link DIR-2640 HNAP LoginPassword Authentication Bypass Vulnerability

First published: Thu May 04 2023(Updated: )

This vulnerability allows network-adjacent attackers to bypass authentication on affected installations of D-Link DIR-2640 routers. Authentication is not required to exploit this vulnerability.

Affected SoftwareAffected VersionHow to fix
D-Link DIR-2640-US Firmware

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Frequently Asked Questions

  • What is the severity of ZDI-23-544?

    The vulnerability ZDI-23-544 has a high severity rating as it allows network-adjacent attackers to bypass authentication.

  • How do I fix ZDI-23-544?

    To fix ZDI-23-544, update the firmware of your D-Link DIR-2640 router to the latest version as provided by the manufacturer.

  • Who is affected by ZDI-23-544?

    ZDI-23-544 affects installations of D-Link DIR-2640 routers that have not been updated with the latest firmware.

  • What can attackers do with ZDI-23-544?

    Attackers exploiting ZDI-23-544 can bypass authentication, potentially gaining unauthorized access to network resources.

  • Is authentication required to exploit ZDI-23-544?

    No, authentication is not required to exploit the ZDI-23-544 vulnerability.

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