CVE-2026-78526: Microsoft Office Word Remote Code Execution Vulnerability
Heap-based buffer overflow in Microsoft Office Word allows an unauthorized attacker to execute code over a network.
Other sources
Microsoft Office Word Remote Code Execution Vulnerability
— Microsoft
Affected Software
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 16.0.17932.20960 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 16.0.10417.20204 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 16.0.14334.20896 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 16.0.5569.1002Patch KB5002898 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 16.0.20326.20136
Event History
Frequently Asked Questions
Does exploitation require an authenticated Office account or other attacker privileges?
No attacker privileges are required. Exploitation requires user interaction, so an attacker would need a user to interact with the malicious content or request.
Which Office products are listed as affected?
The affected software list includes Microsoft Office 2016, Microsoft 365 Apps for Enterprise, Office LTSC 2021 and 2024 in 32-bit and 64-bit editions, Office 2019 for 64-bit editions, and Microsoft Office 365 for Mac.