there is a final and easy fix published there: http://egyptianvulture.blogspot.com/2014/06/how-to-fix-zynos-vulnerability-prevent.html

there is a temporary way to fix it but it's really hard to apply. http://piotrbania.com/all/articles/tplink_patch/

I got the following reply from Catherine Duan from the support team Thank you very much for your reply. sorry that the firmware for V3 cannot be used for V1. For your question, we can try to change...

well the region is Egypt not Argentina as mentioned above. Now I figure out why I got this error because I was using version 3 however my device is version 1 and I downloaded the latest version from...

Region : Egypt Model : TD-W8968 Hardware Version : 1.1 Firmware Version : 1.0.0 Build 100722 Rel.05210 ISP : TE Data I failed to upgrade the firmware of my device which I need to. as I am facing...