Any open current internet security threats?

CNN and others are periodically announcing a internet security threat that has been active for 2 years and is a threat to steal passwords -- suggesting that all passwords be changed.

This has upset my wife -- i am an apple only household since the 1980s with all s/w completely updated to this moment.

what is the status of this threat? do i need to take further percautions?

i think not -- but looking for confirmation.

thnx - j