Buffer overflow in the client in IBM Tivoli Storage Manager (TSM) HSM 5.3.2.0 through 5.3.5.0, 5.4.0.0 through 5.4.2.5, and 5.5.0.0 through 5.5.1.4 on Windows allows remote attackers to cause a denial of service (application crash) or possibly execute arbitrary code via unspecified vectors.