The June cumulative security update for Internet Explorer 6, 7, 8, 9, and 11 is available on Windows Update. It fixes 2 publicly known vulnerabilities and 57 potentially dangerous vulnerabilities that were reported in time before they were publicly disclosed. The most serious vulnerabilities relate to remote code execution if a user visits an attacker’s website. The user can then gain the same rights as the user.
Users with UAC (User Account Control) enabled are better protected against attacks. The update is on Windows Update, so if you have automatic updates enabled, you don't need to take any special action. Otherwise, I recommend deploying this update as soon as possible, because the most vulnerable systems are in the time between the disclosure of the vulnerability and the installation of the security update.
The update is rated critical for Windows Client and Critical for Windows Server. The patch for Internet Explorer 6 applies only to Windows Server 2003.
An update to Adobe Flash Player for Internet Explorer 2966072 has also been released, which is rated as critical.
You will certainly be surprised by the unusually high number of undetected vulnerabilities. It’s not without reason. The CanSecWest conference was held in Vancouver, Canada, where security vulnerabilities in web browsers are discussed, among other things.
For more information, see Security Bulletins MS14-035 and APSB14-16.