Multiple stack-based buffer overflows in HP OpenView Network Node Manager (OV NNM) 7.01, 7.51, and 7.53 allow remote attackers to execute arbitrary code via (1) long string parameters to the OpenView5.exe CGI program; (2) a long string parameter to the OpenView5.exe CGI program, related to ov.dll; or a long string parameter to the (3) getcvdata.exe, (4) ovlaunch.exe, or (5) Toolbar.exe CGI program.