Support Announcements
DIR-2640 & DIR-2650-US :: Rev. Ax :: F/W v1.01B04 : NL_ Server process stack overflow and write out of bounds


On February 18, 2021, a 3rd party security research team identified a vulnerability accusing the DIR-2640 and DIR-2640-US of security issues.These vulnerabilities were confirmed and a patch was issued too close the reported issues.  Please find the beta/hotfix release below.

3rd Party Report information


          - Report provided:


                li yansong  ::  liyansong2012 _at_ outlook _dot_ com

          - Reference :(Link to Public Disclosure will be updated at later time)


                Exploit 1: NL_ Server process stack overflow and write out of bounds



 Affected Models


Model Hardware Revision Affected FW Fixed FW Recommendation  Last Updated
DIR-2640 All Ax Hardware Revisions v1.01B04 & Below v1.11B02_Beta01_HotFix2

  Please Download Patch and Update Device



Regarding Security patch for your D-Link Devices
Firmware updates address the security vulnerabilities in affected D-Link devices. D-Link will update this continually and we strongly recommend all users to install the relevant updates.
Please note that this is a device beta software, beta firmware, or hot-fix release which is still undergoing final testing before its official release. The beta software, beta firmware, or hot-fix is provided on an “as is” and “as available” basis and the user assumes all risk and liability for use thereof. D-Link does not provide any warranties, whether express or implied, as to the suitability or usability of the beta firmware. D-Link will not be liable for any loss, whether such loss is direct, indirect, special or consequential, suffered by any party as a result of their use of the beta firmware.
As there are different hardware revisions on our products, please check this on your device before downloading the correct corresponding firmware update. The hardware revision information can usually be found on the product label on the underside of the product next to the serial number. Alternatively, they can also be found on the device web configuration.