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Research > Zero-Day Tracker > 20130210

D-Link DSL-2740B login.cgi Bypass Vulnerability

Date Disclosed:

Date Patched:
D-Link states a fix is estimated to be released in December 2013.


Affected Software:
D-Link DSL-2740B Router

This vulnerability permits an attacker to connect to the device with administrator permissions. To exploit this vulnerability, a user must already be logged in as an administrator. Once another user is already logged in as administrator, an attacker merely needs to connect to the login page. At that point, they will be logged in to the web interface with administrator permissions.


Code Execution:


Security Bypass
This vulnerability allows an attacker to bypass certain security restrictions on the system, allowing the attacker to gain unauthorized access to the system.

Disable remote administration to the affected device to minimize risk.

BeyondTrust's Retina® Network Security Scanner scans devices to detect for this vulnerability.

  • 19789 - D-Link DSL-2740B login.cgi Bypass Vulnerability (Zero-Day)


2013-02-10 - Original Disclosure
2013-11-14 - D-Link releases advisory, states fix is incoming in December 2013

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