A “very, very large” telecommunications organization, a Fortune 500 company, and multiple government agencies are among the thus far unreported breaches to emerge as a result of the SolarWinds supply chain hack, confirmed a researcher supporting both public and private sector entities in recovery from the devastating attack.

This latest information comes a day after Microsoft confirmed that it notified more than 40 customers of breaches identified off telemetry from its Defender antivirus software.

“There’s a very, very large telecom organization that will have to put its hand up fairly soon, and there’s a very, very large Fortune 500 that will have to put its hand up pretty soon,” said Chris Roberts, virtual CISO and advisor to a number of companies and agencies as part of the HillBilly Hit Squad group of cybersecurity researchers. “From the government agency standpoint, there’s a few of those out there that will have to put their hand up and say, ‘yah we got hit.’”

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