Microsoft hack may have affected 400 companies, says Dutch cybersecurity company Eye Security

The tally of companies and organisations compromised by a vulnerability in Microsoft’s SharePoint software continues to rise and may have reached 400, according to the Dutch cybersecurity company Eye Security, up from around 60.

Compounding matters is a new report from Bloomberg which says the US agency responsible for maintaining and designing the country’s cache of nuclear weapons is among those affected. But classified information and sensitive data from the National Nuclear Security Administration have not been compromised.