Multiple stack-based buffer overflows in the FViewerLoading ActiveX control (FlipViewerX.dll) in E-Book Systems FlipViewer before 4.1 allow remote attackers to cause a denial of service (crash) or execute arbitrary code via long (1) UID, (2) Opf, (3) PAGENO, (4) LaunchMode, (5) SubID, (6) BookID, (7) LibraryID, (8) SubURL, and (9) LoadOpf properties.