This bulletin summary lists security bulletins released for July 2010.

With the release of the bulletins for July 2010, this bulletin summary replaces the bulletin advance notification originally issued July 8, 2010. For more information about the bulletin advance notification service, see Microsoft Security Bulletin Advance Notification.
For information about how to receive automatic notifications whenever Microsoft security bulletins are issued, visit Microsoft Technical Security Notifications.

Microsoft is hosting a webcast to address customer questions on these bulletins on July 14, 2010, at 11:00 AM Pacific Time (US & Canada). Register now for the July Security Bulletin Webcast. After this date, this webcast is available on-demand. For more information, see Microsoft Security Bulletin Summaries and Webcasts.

Microsoft also provides information to help customers prioritize monthly security updates with any non-security, high-priority updates that are being released on the same day as the monthly security updates. Please see the section, Other Information.

Bulletin ID Bulletin Title and Executive Summary Maximum Severity Rating and Vulnerability Impact Restart Requirement Affected Software

MS10-042
Vulnerability in Help and SupportCenter Could Allow Remote Code Execution (2229593)

This security update resolves a publicly disclosed vulnerability in the Windows Help and Support Center feature that is delivered with supported editions of Windows XP and Windows Server 2003. This vulnerability could allow remote code execution if a user views a specially crafted Web page using a Web browser or clicks a specially crafted link in an e-mail message. The vulnerability cannot be exploited automatically through e-mail. For an attack to be successful, a user must click a link listed within an e-mail message.
Critical
Remote Code Execution
May require restart
Microsoft Windows

MS10-043
Vulnerability in Canonical Display Driver Could Allow Remote Code Execution (2032276)

This security update resolves a publicly disclosed vulnerability in the Canonical Display Driver (cdd.dll). Although it is possible that the vulnerability could allow code execution, successful code execution is unlikely due to memory randomization. In most scenarios, it is much more likely that an attacker who successfully exploited this vulnerability could cause the affected system to stop responding and automatically restart.
Critical
Remote Code Execution
Requires restart
Microsoft Windows

MS10-044
Vulnerabilities in Microsoft Office Access ActiveX Controls Could Allow Remote Code Execution (982335)

This security update resolves two privately reported vulnerabilities in Microsoft Office Access ActiveX Controls. The vulnerabilities could allow remote code execution if a user opened a specially crafted Office file or viewed a Web page that instantiated Access ActiveX controls. Users whose accounts are configured to have fewer user rights on the system could be less impacted than users who operate with administrative user rights.
Critical
Remote Code Execution
May require restart
Microsoft Office

MS10-045
Vulnerability in Microsoft Office Outlook Could Allow Remote Code Execution (978212)

This security update resolves a privately reported vulnerability. The vulnerability could allow remote code execution if a user opened an attachment in a specially crafted e-mail message using an affected version of Microsoft Office Outlook. An attacker who successfully exploited this vulnerability could gain the same user rights as the local user. Users whose accounts are configured to have fewer user rights on the system could be less impacted than users who operate with administrative user rights.
Important
Remote Code Execution
May require restart
Microsoft Office