Buffer overflow in NetSupport Manager (NSM) Client 10.00 and 10.20, and NetSupport School Student (NSS) 9.00, allows remote NSM servers to cause a denial of service or possibly execute arbitrary code via crafted data in the configuration exchange phase of an initial connection setup. NOTE: a vendor statement, which is too vague to be sure that it is for this particular issue, says that only a denial of service is possible.
https://exchange.xforce.ibmcloud.com/vulnerabilities/36963
http://www.securitytracker.com/id?1018774
http://www.securityfocus.com/bid/25932
http://www.securityfocus.com/archive/1/481537/100/0/threaded
http://www.netsupportsoftware.com/support/td.asp?td=545&Site=nsltd&Lang=