The FBI believes cyber criminals have successfully targeted Target, Neiman Marcus, and other major retailers using security holes that could have been blocked by retailers.
Target suffered the most significant data breach of recent companies, with more than 70 million customers affected, as the company still deals with public backlash. The Target breach reportedly is tied to a third-party HVAC contractor, and Target likely thought there were no security holes present, but the card data shouldn't have been available in the same corporate network locations.
Security experts warn of similar point-of-sale - and Internet-based threats - should raise alarm bells, especially with a few businesses that haven't come forward. The FBI didn't disclose which major retailers haven't come forward, though "remote management software" was related to cyber crimes carried out against the company.