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CERT Coordination Center

D-Link DIR-685 Xtreme N storage router WPA/WPA2 encryption failure

Vulnerability Note VU#924307

Original Release Date: 2011-10-10 | Last Revised: 2011-10-10


The D-Link DIR-685 Xtreme N storage router is reported to fail open to an unencrypted wireless connection during heavy network load.


The D-Link DIR-685 Xtreme N storage router when configured with WPA/WPA2 and an AES cipher with a pre-shared key (PSK) will fail to an open unencrypted wireless connection during heavy network load, such as, the transfer of several gigabytes of data. The router's wireless connection will remain in an open unencrypted state until the device is rebooted.


An attacker within physical range of the wireless router may be able to connect to the router's network without having to authenticate and then sniff traffic and also use the victim's Internet connection to launch other attacks.


We are currently unaware of a practical solution to this problem.

Vendor Information


D-Link Systems, Inc. Affected

Notified:  August 29, 2011 Updated: October 10, 2011



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



Thanks to Jerry Decime for reporting this vulnerability.

This document was written by Jared Allar.

Other Information

CVE IDs: None
Severity Metric: 0.60
Date Public: 2011-10-10
Date First Published: 2011-10-10
Date Last Updated: 2011-10-10 14:00 UTC
Document Revision: 10

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