CVE-2000-0268

https://notcve.org/view.php?id=CVE-2000-0268

20 Apr 2000 — Cisco IOS 11.x and 12.x allows remote attackers to cause a denial of service by sending the ENVIRON option to the Telnet daemon before it is ready to accept it, which causes the system to reboot. • http://www.cisco.com/warp/public/707/iostelnetopt-pub.shtml •