The US Treasury Department notified lawmakers on Monday that a China state-sponsored actor infiltrated Treasury workstations in what officials are describing as a “major incident.”

Chinese state-sponsored hackers infiltrated the U.S. Treasury Department by exploiting a vulnerability in third-party software provider BeyondTrust, granting them remote access to several workstations and unclassified documents.

Hackers connected to China's government successfully breached several Treasury Department workstations and accessed unclassified documents, according to a letter to Congress on Monday. Why it matters: The U.