CVE-2026-64898: Microsoft Office Remote Code Execution Vulnerability
Heap-based buffer overflow in Microsoft Office allows an unauthorized attacker to execute code locally.
Other sources
Microsoft Office 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 https://aka.ms/OfficeSecurityReleases - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 16.112.26081010
Event History
Frequently Asked Questions
What is the severity of CVE-2026-64898?
CVE-2026-64898 has a high severity rating of 7.8.
How do I fix CVE-2026-64898?
To fix CVE-2026-64898, users should install the latest security updates provided by Microsoft for affected Office products.
What can an attacker do with CVE-2026-64898?
An attacker can exploit CVE-2026-64898 to execute arbitrary code on a victim's machine without authorization.
Which Microsoft Office versions are affected by CVE-2026-64898?
CVE-2026-64898 affects several versions, including Microsoft 365 Apps for Enterprise, Office LTSC 2021, and Office 2019.
What type of vulnerability is CVE-2026-64898?
CVE-2026-64898 is classified as a heap-based buffer overflow vulnerability.