This security update resolves vulnerabilities in Microsoft Office that could allow remote code execution if an attacker convinces a user to open or preview a specially crafted Microsoft Excel workbook in an affected version of Office. An attacker who successfully exploited the vulnerabilities could gain the same user rights as the current user.
Microsoft has released security bulletin MS15-046. Learn more about how to obtain the fixes that are included in this security bulletin:
- For individual, small business, and organizational users: use the Windows automatic updating feature to install the fixes from Microsoft Update. To do this, see Get security updates automatically on the Microsoft Safety and Security Center website.
- For IT professionals: see Microsoft Security Bulletin MS15-046 on the Security TechCenter website.
How to obtain help and support for this security updateHelp installing updates: Support for Microsoft Update
Security solutions for IT professionals: TechNet Security support and troubleshooting
Help protect your Windows-based computer from viruses and malware: Virus Solution and Security Center
Local support according to your country: International support
Restart informationYou may have to restart the computer after you install this security update.
In some cases, this security update does not require a restart. If the required files are being used, this security update will require a restart. If this behavior occurs, a message is displayed that advises you to restart the computer.
To help reduce the possibility that a restart will be required, stop all affected services and close all applications that may use the affected files before you install this security update.
Learn about why you may be prompted to restart your computer after you install a security update on a Windows-based computer.
Security update replacement informationThis security update replaces update 2956142.
Removal informationNote We do not recommend that you remove any security update.
To remove this security update, use the Add or Remove Programs item or the Programs and Features item in Control Panel.
Note When you remove this security update, you may be prompted to insert the disc that contains Microsoft Office. Additionally, you may not have the option to uninstall this security update from the Add or Remove Programs item or the Programs and Features item in Control Panel. There are several possible causes of this issue.
Learn about the ability to uninstall Office updates.