Windows 10 receives multiple security related updates

An update rollup for Windows Server Technical Preview 2 (KB3065331) - Build 10074. The knowledge base web page is unavailable as of this posting. Will update this once it is live.

Cumulative security update for Internet Explorer (KB3049563) - Build 10074/10122. This security update resolves several reported vulnerabilities in Internet Explorer. The most severe of these vulnerabilities could allow remote code execution if a user views a specially crafted webpage in Internet Explorer. To learn more about the vulnerabilities, see Microsoft Security Bulletin MS15-043. Additionally, this security update includes several non-security-related fixes for Internet Explorer. Check out the deployment information.

Vulnerabilities in Windows could allow elevation of privilege (KB3049576) - Build 10122. This security update resolves vulnerabilities in Windows. These vulnerabilities could allow elevation of privilege if an attacker logs on to the system and runs a specially crafted application. To exploit these vulnerabilities, an attacker would first have to log on to the system. The security update addresses the vulnerabilities by correcting how Windows validates impersonation events.

Vulnerability in Windows Journal could allow remote code execution (KB3046002) - Build 10122. This security update resolves vulnerabilities in Microsoft Windows. The vulnerabilities could allow remote code execution if a user opens a specially crafted Journal file. Users whose accounts are configured to have fewer user rights on the system could be less affected than users who have administrative user rights.