Microsoft says ‘SolarWinds’ hackers viewed internal code

Microsoft acknowledged Thursday that attackers who spearheaded a massive hack of government and private computer networks gained access to its internal “source code,” a key building block for its software.

But the US tech giant said the attack, which top US officials have attributed to Russian-led hackers, were unable to compromise or modify any of its software.

The news shows an even broader attack vector for the breach of security software made by the US company SolarWinds.

It is also believed to have given the hackers access to the systems operated by the US Treasury, Energy and Homeland Security Departments and a wide array of other victims in government and the private sector.