diff --git a/marvell/lte-telephony/apps/atcmd_server_ss/src/telcontroller.c b/marvell/lte-telephony/apps/atcmd_server_ss/src/telcontroller.c
index d80dfbc..28f02a0 100755
--- a/marvell/lte-telephony/apps/atcmd_server_ss/src/telcontroller.c
+++ b/marvell/lte-telephony/apps/atcmd_server_ss/src/telcontroller.c
@@ -3771,11 +3771,12 @@
         if(strcmp(line_cut,white_list[i]) == 0)
         {
             ERRMSG(mbtk_check_extension_atcmd, "[%s]count %d,pass atcmd:%s",__FUNCTION__,i,line_cut);
+			free(line_cut);
             return -1;
         }
     }
     needleP =strstr(register_atcmd_buff,line_cut);
-    if(NULL != needleP)
+    if(NULL != needleP && (needleP[strlen(line_cut)] == ';' || needleP[strlen(line_cut)] == '\0'))
     {
         ERRMSG(mbtk_check_extension_atcmd, "[%s] find atcmd:%s",__FUNCTION__,line_cut);
         free(line_cut);