search menu icon-carat-right cmu-wordmark

CERT Coordination Center

Nuuo NT-4040 firmware contains insecure default credentials

Vulnerability Note VU#326395

Original Release Date: 2016-10-20 | Last Revised: 2016-12-13


Nuuo NT-4040 Titan, firmware NT-4040_01.07.0000.0015_1120, uses default credentials


CWE-255: Credentials Management - CVE-2016-6553

Nuuo NT-4040 Titan, firmware NT-4040_01.07.0000.0015_1120, uses non-random default credentials of: admin:admin and localdisplay:111111 . A remote network attacker can gain privileged access to a vulnerable device.


A remote attacker can take complete control of a device using default admin credentials.


Apply an update
Nuuo has released an update to address the issue. Please see the vendor information.

Restrict access and use strong passwords

As a general good security practice, only allow trusted hosts to connect to the device. Use of strong, unique passwords can help reduce the efficacy of brute force password guessing attacks.

Vendor Information


NUUO Affected

Updated:  December 13, 2016



Vendor Statement

We have not received a statement from the vendor.

Vendor Information

Nuuo has released an update which addresses the vulnerability. Please see the URL below to download the update. (web login required)

Vendor References

CVSS Metrics

Group Score Vector
Base 6.9 AV:L/AC:M/Au:N/C:C/I:C/A:C
Temporal 6.2 E:F/RL:W/RC:ND
Environmental 4.7 CDP:N/TD:M/CR:ND/IR:ND/AR:ND



Thanks to Ory Segal and Ezra Caltum for reporting this vulnerability.

This document was written by Trent Novelly.

Other Information

CVE IDs: CVE-2016-6553
Date Public: 2016-10-20
Date First Published: 2016-10-20
Date Last Updated: 2016-12-13 16:20 UTC
Document Revision: 16

Sponsored by CISA.