CVE-2017-17901
ZyXEL P-660HW v3 devices allow remote attackers to cause a denial of service (CPU consumption) via a flood of IP packets with a TTL of 1.
Date published : 2017-12-29
https://www.zyxel.com/support/announcement_denial_of_service.shtml
http://packetstormsecurity.com/files/145548/ZyXEL-P-660HW-TTL-Expiry-Denial-Of-Service.html