Multiple stack-based buffer overflows in ActiveX controls (1) VibeC in (a) vibecontrol.dll, (2) CallManager and (3) ViewerClient in (b) StarClient.dll, (4) ComLink in (c) uicomlink.dll, and (5) WebCamXMP in (d) wcamxmp.dll in Logitech VideoCall allow remote attackers to cause a denial of service (browser crash) and execute arbitrary code via unspecified vectors.