Even so, experts pointed out that the Bluetooth vulnerability might be worthwhile to some attackers.

"I can see this being used in really, really targeted attacks," said Sarwate. "If someone knows you are a CEO, and may even be following you, they could exploit this to try to gain access to your system."

Jason Miller, manager of research and development with VMware's Shavlik Technologies, concurred. "You could be looking at some pretty targeted attacks," said Miller.

And Carey didn't agree with Ness' statements that attacks would be prohibitively pricey. "This would be complicated to pull off, but I wouldn't say it's expensive," he said.

Cary cited as a likely threat , which collected contributions from researchers of all kinds -- both black- and whitehats -- to mass-produce devices able to sniff out Bluetooth traffic, construct and transmit malformed data packets.