The host is installed with Adobe Reader or Acrobat 7.x before 7.1.1, 8.x before 8.1.4 or 9.x before 9.1 and is prone to an unspecified vulnerability. The flaw is present in the JBIG2, which fails to handle PDF file with a malformed JBIG2 symbol dictionary segment. Successful exploitation allows remote attackers to execute arbitrary code.