Updated October 28 to correct that security patch was released last week and security advisory was released on Monday.
LOS ANGELES--Microsoft has released a security patch for software that won't be available publicly until Tuesday at the company's Professional Developer Conference.
"A security issue has been identified that could allow an authenticated remote attacker to compromise your Microsoft Windows-based system and gain control over it," the security update says.
The more than 6,000 attendees who will be walking away from the sold-out event with the Windows 7 operating system software in hand could have been vulnerable to an attacker exploiting the security hole.
"The code that will be distributed at PDC for Windows 7 was put on CD before last week's security update was developed, so it will not contain the update," a Microsoft spokeswoman wrote in an e-mail request for comment. "However, when users install the pre-beta bits, they will be prompted to get the update from Windows Update, just like other Windows customers."
The security patch has been available since Wednesday. The critical security hole also affects Windows 2000, Windows XP, and Windows Server 2003.