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

"Parler was a hotbed for misinformation publishers," the research found.

The Texas Republican has advocated strong encryption and higher standards for connected devices.

Proactive security measures and better IT leadership would have done the job, congressional investigators say.

Thursday's hearing on the Office of Personnel Management’s cyber defenses put Capitol Hill's lack of cybersecurity knowledge on full display.