CVE-2026-102856: Microsoft Office Visio Remote Code Execution Vulnerability
Published Oct 13, 2026
·Updated
Heap-based buffer overflow in Microsoft Office Visio allows an unauthorized attacker to execute code over a network.
Other sources
Microsoft Office Visio Remote Code Execution Vulnerability
— Microsoft
Affected Software
10 affected componentsFixes available
Microsoft 365 Apps
Microsoft 365 Apps
Microsoft Office 2021
Microsoft Office 2021
Microsoft Office 2024
Microsoft Office 2024
Microsoft Office LTSC 2021<16.0.14334.20974
16.0.14334.20974
Microsoft Office LTSC 2024<16.0.17932.21056
16.0.17932.21056
Microsoft Office LTSC 2024<16.0.17932.21056
16.0.17932.21056
Microsoft Office LTSC 2021<16.0.14334.20974
16.0.14334.20974
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 16.0.14334.20974 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 16.0.17932.21056
Event History
Oct 13, 2026
CVE Published
via Microsoft·02:00 PM
Data Sourced
via Microsoft·02:00 PM
DescriptionSeverityWeaknessAffected Software
CVE Published
via MITRE·06:59 PM
Data Sourced
via MITRE·06:59 PM
DescriptionSeverity
Data Sourced
via NVD·07:17 PM
DescriptionSeverityWeaknessAffected Software
Frequently Asked Questions
1
Which environments are in scope for triage?
Prioritize systems running Microsoft 365 Apps for Enterprise or Microsoft Office LTSC 2021 or 2024, in either 32-bit or 64-bit editions.
2
What does exploitation require from an attacker?
The attacker does not require prior privileges, and the attack can be delivered over a network. User interaction is required for exploitation.