Unspecified vulnerability in the Smart Install functionality in Cisco IOS 12.2 and 15.1 allows remote attackers to execute arbitrary code or cause a denial of service (device crash) via crafted TCP packets to port 4786, aka Bug ID CSCto10165.
http://www.cisco.com/en/US/products/products_security_advisory09186a0080b95d4f.shtml
http://tools.cisco.com/security/center/viewAlert.x?alertId=24115