Vulnerability in Windows Theme File Could Allow Remote Code Execution (2864063)
Executive Summary
This security update resolves a privately reported vulnerability in Microsoft Windows. The vulnerability could allow remote code execution if a user applies a specially crafted Windows theme on their system. In all cases, a user cannot be forced to open the file or apply the theme; for an attack to be successful, a user must be convinced to do so.
This security update is rated Important for all supported editions of Windows XP and Windows Server 2003. For supported editions of Windows Vista and Windows Server 2008, this secuirty update as no severity rating. For more information, see the subsection, Affected and Non-Affected Software, in this section.
The security update addresses the vulnerability by changing how Windows handles theme files and screensavers. For more information about the vulnerability, see the Frequently Asked Questions (FAQ) subsection for the specific vulnerability entry under the next section, Vulnerability Information.
Recommendation. Most customers have automatic updating enabled and will not need to take any action because this security update will be downloaded and installed automatically. Customers who have not enabled automatic updating need to check for updates and install this update manually. For information about specific configuration options in automatic updating, see Microsoft Knowledge Base Article 294871.
For administrators and enterprise installations, or end users who want to install this security update manually, Microsoft recommends that customers apply the update at the earliest opportunity using update management software, or by checking for updates using the Microsoft Update service.
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