CVE-2026-78507: 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 16.0.14334.20896 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 16.0.20326.20138 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 16.0.10417.20207
Event History
Frequently Asked Questions
Which Office deployments are affected?
The affected products are Microsoft 365 Apps for Enterprise; Microsoft Office 365 for Mac; Office LTSC for Mac 2024 and 2021; and Office LTSC 2024 and 2021 for both 32-bit and 64-bit editions.
What level of access does an attacker need to exploit this issue?
The vulnerability is remotely exploitable over a network by an unauthorized attacker and does not require privileges. User interaction is required for exploitation.