Envelopes containing a tax form mailed in late January to retired government employees in North Carolina may have revealed the recipients' Social Security numbers.
On Friday, Facebook announced that a number of employee laptops were infected with malware after workers visited a mobile developer website that had been hijacked. On Tuesday, Apple said it was hit with a similar attack.
Viewers of four TV stations, in Michigan and Montana, had their Monday evenings interrupted by an Emergency Alert System broadcast warning of a zombie invasion. It turned out to be a hacking hoax.