Unspecified vulnerability in IBM Lotus Notes and Domino Server before 6.5.5, when running on AIX, allows attackers to cause a denial of service (deep recursion leading to stack overflow and crash) via long formulas.
https://exchange.xforce.ibmcloud.com/vulnerabilities/24206
http://www.vupen.com/english/advisories/2006/0081
http://www.securityfocus.com/bid/16158