Buffer overflow in Skype for Windows 1.1.x.0 through 1.4.x.83 allows remote attackers to execute arbitrary code via (1) callto:// and (2) skype:// links, or (3) a non-standard VCARD, possibly due to an underlying error in the SysUtils.WideFmtStr Delphi routine.
https://exchange.xforce.ibmcloud.com/vulnerabilities/22848
http://www.vupen.com/english/advisories/2005/2197
http://www.securityfocus.com/bid/15190
http://www.pentest.co.uk/documents/ptl-2005-01.html
http://www.kb.cert.org/vuls/id/930345
http://www.kb.cert.org/vuls/id/668193