VMware vSphere Client 4.0, 4.1, 5.0 before Update 3, and 5.1 before Update 2 does not properly validate updates to Client files, which allows remote attackers to trigger the downloading and execution of an arbitrary program via unspecified vectors.
Improper Input Validation The product receives input or data, but it does
not validate or incorrectly validates that the input has the
properties that are required to process the data safely and
correctly.