On Wednesday, Cisco announced hackers are exploiting a critical vulnerability in some of its most popular products that allows the full takeover of affected devices. Worse, there are no patches available at this time.In a security advisory, Cisco said it discovered a hacking campaign on December 10 targeting Cisco AsyncOS software, and in particular the physical and virtual appliances Cisco Secure Email Gateway, Cisco Secure Email, and Web Manager. The advisory said affected devices have a feature called “S ...