This proposed ban goes much further than earlier announced measures requiring large tech companies to get mandatory cybersecurity review in order to list in the U.S.
After a string of cybersecurity headaches over the past year, Microsoft is reportedly warning customers to change database settings to protect against a new flaw.
HeadSpin co-founder Manish Lachwani was forced out of the company last year, and it returned much of the capital it had raised after financial irregularities came to light.