FoxNews reports that White House computers were breached by Chinese hackers. The report says that the breach may have included sensitive military related computers. The breach occurred in early September, and the White House confirmed the breach on Monday.
The breach occurred after a White House staff member opened a legitimate looking email attachment which contained malicious code. This type of attack is call a spear-phishing attack.
The White House claims the infected system was isolated and no classified data was compromised.