Multiple stack-based buffer overflows in PowerArchiver 8.10 through 9.5 Beta 4 and Beta 5 allow remote attackers to execute arbitrary code via a long filename in a (1) ACE or (2) ARJ archive.
http://www.securityfocus.com/bid/14922
http://securityreason.com/securityalert/23
http://secunia.com/secunia_research/2005-50/advisory/