CVE-2026-70301: 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 16.0.17932.21056 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in https://aka.ms/OfficeSecurityReleases - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 16.0.14334.20974
Event History
Frequently Asked Questions
Does exploitation require an authenticated account or elevated privileges?
No. The CVSS vector indicates that no privileges are required before exploitation.
Is user interaction required for exploitation?
Yes. The CVSS vector marks user interaction as required, so an attacker would need a user to interact with the malicious content or attack path.
Are both Windows and Mac Office deployments in scope?
Yes. The affected software list includes Microsoft 365 Apps for Enterprise; Office LTSC 2024 for 32-bit and 64-bit editions and for Mac; Office LTSC 2021 for 32-bit and 64-bit editions and for Mac; and Microsoft Office 365 for Mac.
What level of impact could successful exploitation have?
The CVSS metrics rate confidentiality, integrity, and availability impacts as High. Successful exploitation could therefore expose data, alter data, and disrupt availability.