Support Announcements
DIR-3040 :: H/W Rev. Ax :: F/W v1.20B03 :: Buffer Overflow Remote Code Execution




On December 23, 2022, 3rd party security research from TrendMicro ZDI reported the D-Link DIR-3040 hardware revision Ax with firmware version  v1.20B03 having a Heap-based Buffer Overflow Remote Code Execution Vulnerability in it's MiniDLNA feature.  


As soon as D-Link was made aware of the reported security issues, we had promptly started our investigation and began developing security patches.


D-Link takes the issues of network security and user privacy very seriously. We have a dedicated task force and product management team on call to address evolving security issues and implement appropriate security measures.


Report information  


         - Reported by TrendMicro ZDI


              - ZDI-CAN-19910: MiniDLNA Heap-based Buffer Overflow Remote Code Execution Vulnerability


Affected Models


Model Hardware Revision  Region Affected FW Fixed FW Recommendation  Last Updated
DIR-3040 All Ax Hardware Revisions All Regions v1.20B03 & Below v1.20B03_Beta_Hotfix
Upgrade to Hofix Patch


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.