Microsoft released 12 security bulletins on Tuesday, nine of them rated critical, which resolve 71 vulnerabilities. Microsoft updated their Certificate Trust List (CTL) after the private key for xboxlive.com was leaked to the Web. The company didn’t explain how the leak happened, but the exposed certificates were immediately revoked and replaced. Microsoft says the compromised keys could’ve been used to perform man-in-the-middle attacks prior to them being revoked. The newly updated CTL will be pushed to all supported versions of Windows.”]