Your ISP is apparently using RFC1918, instead of the dedicated RFC6598 range, for cgNAT, assigning you a private IP on WAN. Your router is still doing NAT again, blocking external accesses to its admin page - but if you access your WAN IP from the inside, you will get access to it, that doesn't mean anyone could see it from the outside (nor your ISP).
you mean this accessible because i am lan. What if some other same isp user also has 10.44.8.xx same subnet.. then ? will he be having accesing to my routr page.