Fundamental questions, like how the SolarWinds hackers got into its systems from the start, still aren't answered.

SolarWinds' Sudhakar Ramakrishna said his company is still investigating the scope of the attack.

The $2 billion Austrian firm said on its website that an "ongoing" incident was affecting its ability to process orders.

The U.S. firm issued a statement with few details.

The incident is a blow for a budding company that had recently attracted funding from Silicon Valley and New York venture firms alike.

Carnival raised the possibility of claims from “guests, employees, shareholders or regulatory agencies” because of the incident.