D-Link DSL-2740B Authentication login.cgi access control

CVSS Meta Temp Score
CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.
Current Exploit Price (≈)
Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.
CTI Interest Score
Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.

A vulnerability, which was classified as critical, was found in D-Link DSL-2740B (the affected version unknown). This affects an unknown code of the file login.cgi of the component Authentication. The manipulation with an unknown input leads to a access control vulnerability. CWE is classifying the issue as CWE-264. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

The D-Link DSL-2740B Gateway with firmware EU_1.0, when an active administrator session exists, allows remote attackers to bypass authentication and gain administrator access via a request to login.cgi.

The weakness was released 03/01/2013 by Ivano Binetti as D-Link DSL-2740B (ADSL Router) Authentication Bypass as not defined posting (Website). It is possible to read the advisory at webapp-security.com. The vendor was not involved in the public release. This vulnerability is uniquely identified as CVE-2013-2271 since 02/25/2013. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Technical details and a public exploit are known. The attack technique deployed by this issue is T1068 according to MITRE ATT&CK.

A public exploit has been developed by Ivano Binetti in HTTP Request and been published immediately after the advisory. It is declared as highly functional. The exploit is shared for download at exploit-db.com. We expect the 0-day to have been worth approximately $5k-$25k. By approaching the search of inurl:login.cgi it is possible to find vulnerable targets with Google Hacking. When an administrator in logged in the web management interface an attacker can bypass authentication by connecting to the url.

It is possible to mitigate the weakness by firewalling Web Server Port.

The vulnerability is also documented in the vulnerability database at Exploit-DB (24563). Entry connected to this vulnerability is available at 10296.





  • commercial

CPE 2.3info

CPE 2.2info


VulDB Meta Base Score: 9.8
VulDB Meta Temp Score: 9.6

VulDB Base Score: 9.8
VulDB Temp Score: 9.6
VulDB Vector: 🔍
VulDB Reliability: 🔍



VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍


Class: Access control
CWE: CWE-264
ATT&CK: T1068

Local: No
Remote: Yes

Availability: 🔍
Access: Public
Status: Highly functional
Author: Ivano Binetti
Programming Language: 🔍
Download: 🔍
Google Hack: 🔍

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍


Exploit-DB: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍


Recommended: Firewall
Status: 🔍

0-Day Time: 🔍
Exploit Delay Time: 🔍

Firewalling: 🔍


02/25/2013 🔍
03/01/2013 +4 days 🔍
03/01/2013 +0 days 🔍
03/02/2013 +1 days 🔍
03/04/2013 +2 days 🔍
03/05/2013 +1 days 🔍
11/18/2013 +258 days 🔍
03/15/2019 +1943 days 🔍


Vendor: dlink.com

Advisory: D-Link DSL-2740B (ADSL Router) Authentication Bypass
Researcher: Ivano Binetti
Status: Not defined
Confirmation: 🔍

CVE: CVE-2013-2271 (🔍)
SecurityFocus: 58266 - D-Link DSL-2740B Routers Remote Authentication Bypass Vulnerability
OSVDB: 90822

scip Labs: https://www.scip.ch/en/?labs.20161013
See also: 🔍


Created: 03/05/2013 01:50 PM
Updated: 03/15/2019 09:29 AM
Changes: 03/05/2013 01:50 PM (55), 03/15/2019 09:29 AM (15)
Complete: 🔍


No comments yet. Languages: en.

Please log in to comment.

Are you interested in using VulDB?

Download the whitepaper to learn more about our service!