Hillary Clinton's email server allegedly targeted from China, Germany and South Korea

Cyber-attacks were apparently blocked by 'threat monitoring' product from October 2013 but server was exposed during prior three months, document says

Hillary Clinton's private email server, which stored some 55,000 pages of emails from her time as secretary of state, was the subject of attempted cyber-attacks originating in China, South Korea and Germany after she left office in early 2013, according to a congressional document obtained by the Associated Press.

While the attempts were apparently blocked by a "threat monitoring" product that Clinton's employees connected to her network in October 2013, there was a period of more than three months from June to October 2013 when that protection had not been installed, according to a letter from Republican senator Ron Johnson, chairman of the homeland security and government affairs committee. That means her server was possibly vulnerable to cyber-attacks during that time.