Support Announcements
DSR-250N :: Rev. Ax :: F/W v.3.12 :: CVE-2020-26567 :: Unauthenicated Remote Command Execution (RCE) DDoS vulnerabilities.


On July 15, 2020, a 3rd party security researcher submitted a report accusing the DSR-250N Hardware Revision A1 using firmware v3.12 or older of unauthenicated remote command execution  DDoS vulnerabilities.  This vulnerability was assigned CVE-2020-26567.  The Vulnerability was confirmed and a patch was issued to close the issue.  Please find the patch release below

3rd Party Report information

          - Report provided :: Redteam Pentesting GmbH  :: Link

Reference :


                    - Blog Post ::

                    - CVE-2020-26567 ::  ::


 Affected Models


Model Hardware Revision Affected FW Fixed FW Recommendation  Last Updated
DSR-250N All Rev. A Hardware Revisions v3.12 & Below v3.17B301C_WW
Completed 10/08/2019


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.