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Us\u00f3 una clave AES compartida para todas las instalaciones a partir, de al menos, hasta la versi\u00f3n v7.0.43148, y la us\u00f3 para al menos OptionsPasswordAES en la versi\u00f3n actual del producto. Si un atacante fuese conocido esta clave, podr\u00eda descifrar la informaci\u00f3n de protecci\u00f3n almacenada en el registro o en los archivos de configuraci\u00f3n de TeamViewer. Con versiones anteriores a v9.x, esto permit\u00eda a atacantes descifrar la contrase\u00f1a de Unattended Access en el sistema (que permite el inicio de sesi\u00f3n remoto en el sistema, as\u00ed como la exploraci\u00f3n de archivos sin encabezado). La \u00faltima versi\u00f3n a\u00fan utiliza la misma clave para OptionPasswordAES pero parece haber cambiado la manera en que se almacena la contrase\u00f1a de Unattended Access. 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