Buffer overflow in SecureCRT 5.0.4 and earlier and SecureFX 3.0.4 and earlier allows remote attackers to have an unknown impact when a Unicode string is converted to a "narrow" string.
https://exchange.xforce.ibmcloud.com/vulnerabilities/25092
http://www.vupen.com/english/advisories/2006/0806
http://www.vandyke.com/products/securefx/history.txt
http://www.vandyke.com/products/securecrt/history.txt