US truck and military vehicle maker Navistar suffered from a data breach incident after an unknown attacker have stolen data from its network. The company disclosed the attack in an 8-K report filed with the Securities and Exchange Commission (SEC). Despite the security compromise, Navistar claims that there has been no impact on its business because all of its IT systems are up and running. Several other steps were taken by the business to lessen the effects of the security compromise that occurred.