Busybox contains a Missing SSL certificate validation vulnerability in The "busybox wget" applet that can result in arbitrary code execution. This attack appear to be exploitable via Simply download any file over HTTPS using "busybox wget https://compromised-domain.com/important-file".
https://usn.ubuntu.com/4531-1/
https://git.busybox.net/busybox/commit/?id=45fa3f18adf57ef9d743038743d9c90573aeeb91
http://lists.busybox.net/pipermail/busybox/2018-May/086462.html