Savant web server allows remote attackers to execute arbitrary commands via a long GET request.
https://exchange.xforce.ibmcloud.com/vulnerabilities/4901
https://euvd.enisa.europa.eu/vulnerability/EUVD-2000-0637
http://www.securityfocus.com/bid/1453
http://archives.neohapsis.com/archives/bugtraq/2000-07/0114.html