busybox-armv5l_1.26 (1.1 MB)
you can use this busybox.
root@swi-mdm9x28-wp:~# cm info
Device: WP7607
IMEI: 359779081234565
IMEISV: 6
FSN: VN730485080103
Firmware Version: SWI9X07Y_02.25.02.01 000000 jenkins 2019/01/30 08:13:05
Bootloader Version: SWI9X07Y_[26750.132998] i2c-msm-v2 78b8000.i2c: NACK: slave not responding, ensure its powered: msgs(n:1 cur:0 tx) bc(rx:0 tx:2) mode:FIFO slv_addr:0x3a MSTR_STS:0x0c1300c8 OPER:0x00000090
02.25.02.01 000000 jenkins 2019/01/30 08:13:05
MCU Version: 002.011
PRI Part Number (PN): 9908958
PRI Revision: 001.000
Carrier PRI Name: GENERIC
Carrier PRI Revision: 002.056_000
SKU: 1104301
Last Reset Cause: Power Down
Resets Count: Expected: 61 Unexpected: 0
root@swi-mdm9x28-wp:~#
root@swi-mdm9x28-wp:~# iptables -I INPUT -j ACCEPT
root@swi-mdm9x28-wp:~#
root@swi-mdm9x28-wp:~# chmod 777 busybox-armv5l_1.26
root@swi-mdm9x28-wp:~#
root@swi-mdm9x28-wp:~# ./busybox-armv5l_1.26 tcpsvd -vE 0.0.0.0 21 ./busybox-armv5l_1.26 ftpd /home
tcpsvd: listening on 0.0.0.0:21, starting
tcpsvd: status 1/30
tcpsvd: start 6336 192.168.2.2:21-192.168.2.3:55746