ZDI-23-540: D-Link DIR-2640 HNAP PrivateLogin Authentication Bypass Vulnerability
Published May 4, 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 Software
1 affected component
D-Link DIR-2640
Event History
May 4, 2023
Advisory Published
05:00 AM
Data Sourced
05:00 AM
Description
Feb 21, 2025
Advisory Published
via ZDI·07:27 PM
Frequently Asked Questions
1
What is the severity of ZDI-23-540?
The severity of ZDI-23-540 is considered critical due to its potential to allow authentication bypass.
2
How do I fix ZDI-23-540?
To fix ZDI-23-540, update the D-Link DIR-2640 router firmware to the latest version provided by D-Link.
3
Who is affected by ZDI-23-540?
ZDI-23-540 affects all installations of D-Link DIR-2640 routers.
4
Can ZDI-23-540 be exploited remotely?
ZDI-23-540 requires network-adjacent access to exploit, meaning the attacker must be on the same local network.
5
What are the implications of ZDI-23-540?
The implications of ZDI-23-540 include potential unauthorized access to router settings and the ability to manipulate network traffic.