CVE-2026-78514: Microsoft Office Word Remote Code Execution Vulnerability
Microsoft Office Word Remote Code Execution Vulnerability
Other sources
Use after free in Microsoft Office Word allows an unauthorized attacker to execute code over a network.
— 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 16.0.5569.1000Patch KB5002923 - 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 16.0.20326.20136 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 16.0.10417.20204
Event History
Frequently Asked Questions
Which Office deployments are affected?
The affected products listed are Word 2016, Microsoft 365 Apps for Enterprise, Office LTSC 2024 for 32-bit and 64-bit editions, Office LTSC 2021 for 32-bit and 64-bit editions, and Office LTSC for Mac 2021 and 2024.
Does exploitation require an authenticated account or user interaction?
The severity vector indicates no privileges are required, but user interaction is required. An attacker would need a user to interact with attacker-controlled content to trigger the vulnerability.
What level of impact could successful exploitation have?
Successful exploitation can allow code execution. The provided severity vector rates confidentiality, integrity, and availability impacts as high.