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Note: Sheet views are currently limited to Excel 2007 or later files stored in OneDrive, OneDrive for Business, and SharePoint.If you save a local copy of a file that contains sheet views, the sheet views will be unavailable until the file is saved to SharePoint and opened from that environment. Start quickly with the most recent versions of Word, Excel, PowerPoint, Outlook, OneNote and OneDrive —combining the familiarity of Office and the unique Mac features you love. Work online or offline, on your own or with others in real time—whatever works for what you're doing.

Vulnerabilities in Microsoft Office Could Allow Remote Code Execution (3072620)

Published: July 14, 2015

Version: 1.0

Executive Summary

1. Microsoft Excel Viewer For Mac Software. MOOS Project Viewer is a Microsoft Project viewer that can open any MS Project file type (.mpp,.mpt,.mpx,.xml) for any Microsoft Project version (2000, 2003, 2007 and 2010). Available views: WBS, Gantt chart, task sheet, resource sheet, calendars.
2. Microsoft Report Viewer Redistributable 2008. Microsoft Office for Mac 2011 Service Pack 1 (14.1.0). Microsoft has released an update for Microsoft Excel 2010.
3. 2: Enter Mac Safe Mode to isolate the issue caused by the other programs on your Mac. 3: Temporary remove Excel Add-Ins if you use any. Sometimes, Add-ins would slow down Excel performance as well. 4: Create a new user profile to determine whether the issue is caused by profile corruption.

This security update resolves vulnerabilities in Microsoft Office. The most severe of the vulnerabilities could allow remote code execution if a user opens a specially crafted Microsoft Office file. An attacker who successfully exploited the vulnerabilities could run arbitrary code in the context of the current user. Customers whose accounts are configured to have fewer user rights on the system could be less impacted than those who operate with administrative user rights.

This security update is rated Important for all supported editions of the following software:

• Microsoft Excel 2007, Microsoft PowerPoint 2007, Microsoft Word 2007
• Microsoft Office 2010, Microsoft Excel 2010, Microsoft PowerPoint 2010, Microsoft Word 2010
• Microsoft Excel 2013, Microsoft PowerPoint 2013, Microsoft Word 2013
• Microsoft Excel 2013 RT, Microsoft PowerPoint 2013 RT, Microsoft Word 2013 RT
• Microsoft Excel for Mac 2011
• Microsoft Excel Viewer, Microsoft Office Compatibility Pack, Microsoft Word Viewer
• Excel Services on Microsoft SharePoint Server 2007
• Excel Services on Microsoft SharePoint Server 2010
• Excel Services on Microsoft SharePoint Server 2013

For more information, see the Affected Software section.

The security update addresses the vulnerabilities by correcting how Office handles files in memory, by correcting how Excel handles the loading of certain specially crafted binaries, and by correcting how memory information is disclosed. For more information about the vulnerabilities, see the Vulnerability Information section.

For more information about this update, see Microsoft Knowledge Base Article 3072620.

Affected Software

The following software versions or editions are affected. Versions or editions that are not listed are either past their support life cycle or are not affected. To determine the support life cycle for your software version or edition, see Microsoft Support Lifecycle.

Microsoft Office Software

Microsoft Office Services and Web Apps

Update FAQ

I have Microsoft Word 2010 installed. Why am I not being offered the 3054971 update?
The 3054971 update only applies to systems running specific configurations of Microsoft Office 2010. Some configurations will not be offered the update.

I am being offered this update for software that is not specifically listed in the Affected Software table. Why am I being offered this update?
When updates address vulnerable code that exists in a component that is shared between multiple Microsoft Office products or shared between multiple versions of the same Microsoft Office product, the update is considered to be applicable to all supported products and versions that contain the vulnerable component.

For example, when an update applies to Microsoft Office 2007 products, only Microsoft Office 2007 may be specifically listed in the Affected Software table. However, the update could apply to Microsoft Word 2007, Microsoft Excel 2007, Microsoft Visio 2007, Microsoft Compatibility Pack, Microsoft Excel Viewer, or any other Microsoft Office 2007 product that is not specifically listed in the Affected Software table.

For example, when an update applies to Microsoft Office 2010 products, only Microsoft Office 2010 may be specifically listed in the Affected Software table. However, the update could apply to Microsoft Word 2010, Microsoft Excel 2010, Microsoft Visio 2010, Microsoft Visio Viewer, or any other Microsoft Office 2010 product that is not specifically listed in the Affected Software table.

For example, when an update applies to Microsoft Office 2013 products, only Microsoft Office 2013 may be specifically listed in the Affected Software table. However, the update could apply to Microsoft Word 2013, Microsoft Excel 2013, Microsoft Visio 2013, or any other Microsoft Office 2013 product that is not specifically listed in the Affected Software table.

Severity Ratings and Vulnerability Identifiers

The following severity ratings assume the potential maximum impact of the vulnerability. For information regarding the likelihood, within 30 days of this security bulletin's release, of the exploitability of the vulnerability in relation to its severity rating and security impact, please see the Exploitability Index in the July bulletin summary.

Microsoft Office Software

Microsoft Office Services and Web Apps

Vulnerability Information

Multiple Microsoft Office Memory Corruption Vulnerabilities

Remote code execution vulnerabilities exist in Microsoft Office software when the Office software fails to properly handle objects in memory.

Exploitation of these vulnerabilities requires that a user open a specially crafted file with an affected version of Microsoft Office software. In an email attack scenario an attacker could exploit the vulnerabilities by sending the specially crafted file to the user and convincing the user to open the file. In a web-based attack scenario an attacker could host a website (or leverage a compromised website that accepts or hosts user-provided content) that contains a specially crafted file that is designed to exploit the vulnerabilities. An attacker would have no way to force users to visit the website. Instead, an attacker would have to convince users to click a link, typically by way of an enticement in an email or Instant Messenger message.

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An attacker who successfully exploited these vulnerabilities could run arbitrary code in the context of the current user. If the current user is logged on with administrative user rights, an attacker could take complete control of the affected system. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights. 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.

The security update addresses the vulnerabilities by correcting how Microsoft Office handles files in memory.

The following tables contain links to the standard entry for each vulnerability in the Common Vulnerabilities and Exposures list:

Update FAQ

I have Microsoft Word 2010 installed. Why am I not being offered the 3054971 update?
The 3054971 update only applies to systems running specific configurations of Microsoft Office 2010. Some configurations will not be offered the update.

I am being offered this update for software that is not specifically listed in the Affected Software table. Why am I being offered this update?
When updates address vulnerable code that exists in a component that is shared between multiple Microsoft Office products or shared between multiple versions of the same Microsoft Office product, the update is considered to be applicable to all supported products and versions that contain the vulnerable component.

For example, when an update applies to Microsoft Office 2007 products, only Microsoft Office 2007 may be specifically listed in the Affected Software table. However, the update could apply to Microsoft Word 2007, Microsoft Excel 2007, Microsoft Visio 2007, Microsoft Compatibility Pack, Microsoft Excel Viewer, or any other Microsoft Office 2007 product that is not specifically listed in the Affected Software table.

For example, when an update applies to Microsoft Office 2010 products, only Microsoft Office 2010 may be specifically listed in the Affected Software table. However, the update could apply to Microsoft Word 2010, Microsoft Excel 2010, Microsoft Visio 2010, Microsoft Visio Viewer, or any other Microsoft Office 2010 product that is not specifically listed in the Affected Software table.

For example, when an update applies to Microsoft Office 2013 products, only Microsoft Office 2013 may be specifically listed in the Affected Software table. However, the update could apply to Microsoft Word 2013, Microsoft Excel 2013, Microsoft Visio 2013, or any other Microsoft Office 2013 product that is not specifically listed in the Affected Software table.

Severity Ratings and Vulnerability Identifiers

The following severity ratings assume the potential maximum impact of the vulnerability. For information regarding the likelihood, within 30 days of this security bulletin's release, of the exploitability of the vulnerability in relation to its severity rating and security impact, please see the Exploitability Index in the July bulletin summary.

Microsoft Office Software

Microsoft Office Services and Web Apps

Vulnerability Information

Multiple Microsoft Office Memory Corruption Vulnerabilities

Remote code execution vulnerabilities exist in Microsoft Office software when the Office software fails to properly handle objects in memory.

Exploitation of these vulnerabilities requires that a user open a specially crafted file with an affected version of Microsoft Office software. In an email attack scenario an attacker could exploit the vulnerabilities by sending the specially crafted file to the user and convincing the user to open the file. In a web-based attack scenario an attacker could host a website (or leverage a compromised website that accepts or hosts user-provided content) that contains a specially crafted file that is designed to exploit the vulnerabilities. An attacker would have no way to force users to visit the website. Instead, an attacker would have to convince users to click a link, typically by way of an enticement in an email or Instant Messenger message.

Microsoft Excel Viewer Mac Download

An attacker who successfully exploited these vulnerabilities could run arbitrary code in the context of the current user. If the current user is logged on with administrative user rights, an attacker could take complete control of the affected system. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights. 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.

The security update addresses the vulnerabilities by correcting how Microsoft Office handles files in memory.

The following tables contain links to the standard entry for each vulnerability in the Common Vulnerabilities and Exposures list:

Originally published: October 29, 2018
Updated: July 17, 2020

Please go here to search for your product's lifecycle.

The following list represents products retiring or reaching the end of support in 2020. Upon retirement or end of support, there will be no new security updates, non-security updates, free or paid assisted support options or online technical content updates. Go here to learn about Fixed and Modern Lifecycle policies and service packs.

For a comprehensive list of Microsoft products and their lifecycle policy timelines, including migration options, please search the Microsoft Lifecycle Product Database.

If you have any questions regarding support for a product, please contact your Microsoft Account Representative. If you need technical support, visit the Microsoft Support website.

Products governed by the Modern Policy

The following products, governed by the Modern Policy, will retire in 2020.

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Products governed by the Fixed Policy

The following products, governed by the Fixed Policy, will end support in 2020.

Microsoft Excel Viewer Mac Os

Service Packs

The following service packs apply to Fixed Policy products, and will end support in 2020.

Products moving to Extended Support

The following products will be moving from Mainstream to Extended Support in 2020. Extended Support includes security updates at no cost, and paid non-security updates and support. Additionally, Microsoft will not accept requests for design changes or new features during the Extended Support phase.

Change Log

^{September 2019 editsADDED: Windows Analytics, Windows Storage Server 2008 (all editions), Internet Explorer 10, StorSimple Data Manager, Visio Services in SharePoint Online
ADDED: Windows 10, version 1903 (Enterprise, Home, Pro, Pro for Workstations, IoT Enterprise) and Windows Server, version 1903 (Datacenter, Standard, IoT Enterprise)
EDITED: Exchange Server 2010 (all editions) support extended from January 14, 2020 to October 13, 2020}

Microsoft Viewers Download

^{January 2020 edits
ADDED: Exchange Server 2010, Microsoft Application Virtualization 4.6 for Remote Desktop Services, Expression Studio 4, Windows 10 Pro Education,
EDITED: Visual Basic 2010 Express, Visual Basic C# 2010 Express, Visual Basic C++ 2010 Express, Visual Web Developer 2010 Express, Expression Encoder 4, Expression Web 4 date updated to July 14, 2020
EDITED: OneNote 2016 Mainstream Support extended from October 13, 2020 to October 10, 2023
EDITED: specific editions removed, 'all editions' added to parent listing}

^{February 2020 edits
ADDED: Dynamics 365 Business Central on-premises, Microsoft Identity Manager 2016 Service Pack 1}

Microsoft Excel Viewer Mac Catalina

^{April 2020 edits
EDITED: Windows 10, version 1709 (Enterprise, Education, IoT Enterprise) extended to October 13, 2020
EDITED: Windows 10, version 1809 (Home, Pro, Pro Education, Pro for Workstation, IoT Core), Windows Server version 1809 (Datacenter Core, Standard Core) extended to November 10, 2020
REMOVED: PerformancePoint Services in SharePoint Server 2010, Project Server 2010, SharePoint Server 2010 (support extended from October 13, 2020 to April 13, 2021)}

^{June 2020 edits
REMOVED: Windows Defender Antivirus for Windows 10}

^{July 2020 edits
ADDED: Expression Studio Ultimate 4
EDITED: Visual Basic 2010 Express, Visual C# 2010 Express, and Visual C++ 2010 Express corrections}