Format string vulnerability in the safe_cprintf function in acebot_cmds.c in Alien Arena 2006 Gold Edition 5.00 allows remote attackers (possibly authenticated) to execute arbitrary code via unspecified vectors when the server sends crafted messages to the clients.
https://exchange.xforce.ibmcloud.com/vulnerabilities/25199
http://www.vupen.com/english/advisories/2006/0882
http://www.securityfocus.com/bid/17028
http://www.securityfocus.com/archive/1/426984/100/0/threaded
http://secunia.com/advisories/19144
http://archives.neohapsis.com/archives/fulldisclosure/2006-03/0147.html