Buffer overflow in the Web GUI in the IBM Tivoli Storage Manager (TSM) client 5.1.0.0 through 5.1.8.2, 5.2.0.0 through 5.2.5.3, 5.3.0.0 through 5.3.6.4, 5.4.0.0 through 5.4.2.6, and 5.5.0.0 through 5.5.1.17 allows attackers to cause a denial of service (application crash) or execute arbitrary code via unspecified vectors.