Support Announcements
(non-US) DIR-819 :: HW:A1 :: FW v1.06 :: Remote Code Execution (RCE)



On July 13, 2021, a 3rd party researcher at HITCON ZeroDay publically disclosed a 0-day security report on the non-US SKU DIR-819 with firmeare v1.06 which may allow a user to access to device's configuration and managment interface.


Once the device was fully booted , it gave access to connected clients over LAN to upload or dowload the cfg file over tftp. This access can elevate security issues by allowing a malicious users to change the devices configuration.


The new firmware patch doesn't allow downloading or uploading config files by disabling the functionality.



3rd Party Report information


          - The report provided by

                 DrmnSamoLiu at HITCON ZeroDay



          - Reference :

               - Public Disclosure:: ZDID:ZD-2021-00248 (Link to Post once available)


Affected Models


Model  Region Hardware Revision Affected FW Fixed FW Recommendation  Last Updated
DIR-819 non-US All A Revisions v1.06 and below v1.06B06 Beta Download and Upgrade 08/05/21


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 offer 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.