CVE-2026-108429: 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 16.0.14334.20974 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 16.0.17932.21056 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in https://aka.ms/OfficeSecurityReleases
Event History
Frequently Asked Questions
What must an attacker do to exploit this vulnerability?
The attacker would need to get a user to interact with malicious content in Microsoft Word. The issue is remotely exploitable and does not require the attacker to have privileges on the target system.
What is the likely impact if exploitation succeeds?
Successful exploitation can allow code execution and has high confidentiality, integrity, and availability impact. This could let an attacker run code in the context of the affected Word user.
Which Office products are identified as affected?
The affected software list includes Microsoft 365 Apps for Enterprise and Microsoft Office LTSC 2021 and 2024, in both 32-bit and 64-bit editions where listed.