Apple acquired Authentec in July. It is a company that held the rights to fingerprint-reading technology since 2010, but the tech was originally developed by a company called UPEK. According to a report from ArsTechnica, citing several security researchers, a product that uses the fingerprint technology now owned by Apple, UPEK Protector Suite, has been exposed as a serious security threat for Windows users:
Security consultants have independently confirmed a serious security weakness that makes it trivial for hackers with physical control of many computers sold by Dell, Acer, and at least 14 other manufacturers to quickly recover Windows account passwords…The weakness came to light no later than September, but Apple has yet to acknowledge it or warn end users how to work around it. No one has accused Apple of being responsible for the underlying design of fingerprint-reading software.