Rural banks using MBv8 and MBWin should not worry about heartbleed, a security bug that threatens all open-source OpenSSL IT systems. Web based IT systems often use open source commercial development models making them available to the public internet access and its accompanying security challenges.
Because MB systems do not use OpenSSL for encryption of data, MBv8 and MBWin are safe from this vulnerability.
Public emails, however, may encounter data breach because day-to-day exchanges are usually carried out by email in the internet. In order to prevent hackers from stealing personal information, strong passwords should be used and changed regularly.