Just got an OTA file.
A Description said that it is a patch for heartbleed.
Even though I'm not sure there still be people on stock rom in this forum but this file may be useful in some way.
*edit : ahh I can't post outside link
so please change the url's head by yourself
"h t t p s" dl.dropboxusercontent.com/u/26755092/OTA_ENDEAVOR_U_JB_50_S_hTC_Asia_WWE_4.19.707.4-4.19.707.3_release_368604.zip
ps. my device has CID HTC_044
file name may also answer you for the rest.