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CERT Coordination Center

Netmaster cable modem information leakage vulnerability

Vulnerability Note VU#259548

Original Release Date: 2014-09-04 | Last Revised: 2014-09-04


The Netmaster CBW700N wireless cable modem enables remote SNMP public access by default


CWE-200 - Information Exposure

The Netmaster CBW700N wireless cable modem running software version 81.447.392110.729.024 was found to expose sensitive information such as username, password, and wifi keys via the SNMP public community string.


A remote unauthenticated attacker may be able to retrieve the username, password, and other sensitive information about the device.


The CERT/CC is currently unaware of a practical solution to this problem.

Vendor Information


Netmaster Affected

Notified:  July 17, 2014 Updated: August 15, 2014



Vendor Statement

We have not received a statement from the vendor.

Vendor Information

We are not aware of further vendor information regarding this vulnerability.

CVSS Metrics

Group Score Vector
Base 5 AV:N/AC:L/Au:N/C:P/I:N/A:N
Temporal 4.3 E:F/RL:U/RC:UC
Environmental 4.5 CDP:LM/TD:M/CR:ND/IR:ND/AR:ND



Thanks to Deral Heiland of Rapid7, Inc. for reporting this vulnerability.

This document was written by Chris King.

Other Information

CVE IDs: CVE-2014-4862
Date Public: 2014-08-21
Date First Published: 2014-09-04
Date Last Updated: 2014-09-04 14:07 UTC
Document Revision: 16

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