Microsoft has issued a security advisory urging organizations and individual users to update older Office applications immediately. The warning highlights risks in legacy deployments where update mechanisms may be inconsistent and security patches are no longer automatically applied.
Failure to update can expose users to remote code execution, data theft, and compliance violations. The following details cover affected products, timelines, migration options, and recommended actions for IT teams and end users.
| Product | Support Status | Update Channel | Recommended Action |
|---|---|---|---|
| Microsoft Office 2010 | Extended support ended | Manual updates only | Upgrade to a modern version |
| Microsoft Office 2013 | Mainstream support ended | Limited security updates | Apply updates and plan migration |
| Microsoft 365 Apps | Fully supported | Continuous monthly channel | Enable auto-update |
| Office LTSC 2021 | Extended support available | Long-term servicing channel | Confirm security configuration |
Risks Of Running Outdated Office Versions
Exploitable Vulnerabilities
Older Office versions may contain unpatched vulnerabilities that attackers can leverage for remote code execution. Without regular updates, organizations rely on an expanding set of weak spots in their defense perimeter.
Compliance And Data Protection Impact
Regulatory frameworks often require timely patching and documented update procedures. Running unsupported Office apps can trigger audit findings, fines, and reputational damage after a security incident.
Migration Path To Modern Office Versions
From Office 2010 To Microsoft 365
Moving from Office 2010 to Microsoft 365 brings cloud-based identity, device management, and continuous security updates. IT teams can use phased rollouts to reduce disruption and validate compatibility with line-of-business applications.
Coexistence And Compatibility Checks
Before migration, validate add-ins, templates, and custom macros against newer Office builds. Use compatibility toolkits and virtual testing environments to identify required changes for documents and workflows.
Deployment Best Practices For IT Teams
Automated Update Management
Enable Microsoft Intune or Group Policy-based update controls to enforce current build levels across endpoints. Configure release preference channels to balance feature access with stability requirements.
Monitoring And Incident Response
Implement detection rules for obsolete Office versions attempting to connect to cloud services. Prepare playbooks for rapid remediation when legacy applications are discovered on the network.
Immediate Actions To Reduce Risk
- Audit endpoints to identify installations of Office 2010 and Office 2013
- Enable automatic updates for Microsoft 365 Apps or deploy LTSC 2021 under long-term servicing
- Test critical documents and macros in a non-production environment
- Document the migration plan, timeline, and rollback procedures
- Monitor network traffic for legacy Office versions attempting cloud connections
FAQ
Reader questions
Which Office versions are currently receiving security updates from Microsoft?
Microsoft 365 Apps and Office LTSC 2021 continue to receive security updates. Office 2010 and Office 2013 are outside standard support and no longer receive timely patches.
Can I delay updating Office if my macros rely on older versions?
Delaying updates increases exposure to unpatched vulnerabilities. Test macros in a controlled environment and prioritize migrating to a supported Office build as soon as possible.
Will enabling automatic update break existing custom integrations?
Potential breakage exists when integrations depend on deprecated APIs or behaviors. Run integration tests in a staging environment before rolling out updates organization-wide.
How can users verify that their Office installation is up to date?
Check the About section in any Office app and review the build number and update channel. Compare this information against the current version list published by Microsoft for your subscription or license type.