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Se consigue gracias al env\u00edo de cabeceras MIME inv\u00e1lidas para el adjunto que le permiten disfrazarse como un tipo de archivo no ejecutable. \r\n\r\nEl correo electr\u00f3nico v\u00eda HTML se representa en p\u00e1ginas web que el explorador es capaz de interpretar. Cuando el correo contiene ficheros adjuntos el Explorador tambi\u00e9n es capaz de abrir la aplicaci\u00f3n asociada a los ficheros binarios adjuntos cuyo tipo (extensi\u00f3n de archivo) est\u00e1 definido en las cabeceras MIME. \r\n\r\nSin embargo, existe un defecto en el tipo de tratamiento que es especificado para ciertos tipos MIME sin identificar. 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