Supermicro said an internal review of its production and testing process found no evidence of malicious hardware being implanted onto its motherboards, as a Bloomberg story had reported.

In a letter sent to customers last week, executives said the company is undergoing a "complicated and time-consuming review" to address the claims made in the article.

“We’ve seen no evidence of that, but we’re not taking anything for granted,” Coats told CyberScoop.

Senators sought answers from the DHS and FBI head about a reported widespread supply chain attack, as well as foreign election interference.