Microsoft Silverlight 5 before 5.1.41105.00 allows remote attackers to execute arbitrary code or cause a denial of service (out-of-bounds read or write access) via unspecified open and close requests, aka "Microsoft Silverlight RCE Vulnerability."
Improper Restriction of Operations within the Bounds of a Memory Buffer The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary.