Multithreaded TFTP Server for "PXEBOOT, Router image load, supports tsize, blksize, Interval and Server Port Ranges, Block Number Rollover for Large Files. Can be installed as Service/daemon. Single Port version also available. Freeware Software Download". A buffer overflow vulnerability has been discovered in the TFTP Server for Windows, this vulnerability allows remote attackers to cause the product to execute arbitrary code.

http://www.securiteam.com/exploits/5UP0X0ANPE.html