Critical security flaws targeting Windows and Office users allow hackers to take complete control of a victim's computer by clicking a malicious link or opening a file. Patch now.

The Singaporean government said the China-backed hackers gained "limited access to critical systems" run by the country's top four telecommunication giants, but said they did not disrupt services or steal customers' data.

More than half-a-million people who bought access to phone surveillance and social media snooping apps had their email address and partial payment card numbers published online.