Apple, for instance, faces a pair of "zero-day" vulnerabilities -- unpatched bugs that are already being exploited -- in the iOS mobile operating system that powers the iPhone and iPad.

"The focus for this month is not necessarily OSes and applications, but the constant stream of vulnerabilities being discovered in the mobile devices connected to our corporate networks," said Paul Henry, security and forensic analyst at Lumension, in an email today. "Microsoft does not have exclusivity when it comes to issuing patches."

Microsoft's security updates will be released at approximately 1 p.m. ET on July 12.

Gregg Keizer covers Microsoft, security issues, Apple, Web browsers and general technology breaking news for Computerworld. Follow Gregg on Twitter at , or subscribe to . His e-mail address is .

in Computerworld's Security Topic Center.