CVE-2026-83891: Microsoft Office Word Remote Code Execution Vulnerability
Microsoft Office Word Remote Code Execution Vulnerability
Other sources
Stack-based buffer overflow 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 16.0.17932.21056 - 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
Which Office deployments are listed as affected?
The affected products include Microsoft 365 Apps for Enterprise; Microsoft Office 365 for Mac; Office LTSC 2021 for 32-bit and 64-bit editions and for Mac; and Office LTSC 2024 for 32-bit and 64-bit editions and for Mac.
Does exploitation require an authenticated Office user or elevated privileges?
No privileges are required according to the CVSS vector. The vector also indicates that user interaction is required.
What could a successful exploit allow an attacker to do?
The reported impact includes high confidentiality, integrity, and availability effects. A successful attack could therefore expose or alter data and disrupt affected systems.