http://forum.mikrotik.com/t/s-o-s-new-vurnelabilty-on-6-42-3-no/120528/1
http://forum.mikrotik.com/t/hacked-again-changed-username-and-password/120838/1
http://forum.mikrotik.com/t/unknown-admin-with-unknown-ip-address-loges-in-my-mikrotik-router-via-api/120785/1
And official one:
http://forum.mikrotik.com/t/vpnfilter-official-statement/119763/1