Support Announcements
DIR-878 :: H/W Rev. Ax :: F/W v1.30B08 :: CVE-2021-30072 : Unauthenticated Stack-based Buffer Overflow Vulnerability


On January 12, 2021, a 3rd party security researcher submitted a report accusing the DIR-878 using firmware v1.30B08 of a LAN-side unauthenticated stack-based buffer overflow vulnerability   The Vulnerability was confirmed and a patch was issued too close the reported issue.  Please find the beta/hotfix release below.

3rd Party Report information


          - Report provided: pwang :: 18222325265 _at_ 163 _dot_ com

          - Reference :

                CVE-2021-30072 :


                 The issue was discovered on DLINK DIR-878 1.30B08. The firmware has a strcat is misused, which can be exploited to a stack-based buffer overflow vulnerability that does not require authentication.The vulnerability was in file prog.cgi, main function. Sending a malicous request to the target device from the LAN-side can cause the prog.cgi process to crash, resulting the device to malfunction.


 Affected Models


Model Hardware Revision Affected FW Fixed FW Recommendation  Last Updated
DIR-878 All Ax Hardware Revisions v1.30B08 & Below v1.30B08 Hotfix fro Buffer Overflow Please Download and Update Device 04/12//2021


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.