The software giant said that critical customer information had not been compromised. Microsoft did not reveal specific details about the attack, but indicated that it was similar to recent cyber attacks on Facebook (NASDAQ:FB) and Apple (NASDAQ:AAPL), Reuters noted.
Last week, Apple disclosed that some of its computers had been infected by malware that exploits a security flaw in Oracle‘s (NASDAQ:ORCL) Java software. The same malware was reportedly used to infect Facebook’s systems.
The breaches at leading U.S. technology companies come as a number of newspapers, including News Corp.‘s (NASDAQ:NWSA) Wall Street Journal and the New York Times (NYSE:NYT) also disclosed cyber attacks. The Times noted last month that Chinese hackers had penetrated its systems looking for information on a Chinese officials overseas family fortune.
Microsoft said it was continuing to investigate the attack on its computers.
Despite the news, shares of Microsoft rose fractionally in Monday morning trading.