CVE-2026-64911: Microsoft Office Remote Code Execution Vulnerability
Integer overflow or wraparound 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 16.112.26081010 - 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 is the severity of CVE-2026-64911?
CVE-2026-64911 has a severity rating of high with a score of 7.8.
How do I fix CVE-2026-64911?
To fix CVE-2026-64911, ensure your Microsoft Office software is updated to the latest version provided by Microsoft.
What kind of attack can exploit CVE-2026-64911?
CVE-2026-64911 can be exploited by an unauthorized attacker to execute remote code locally on vulnerable Microsoft Office applications.
Which software is affected by CVE-2026-64911?
CVE-2026-64911 affects Microsoft 365 Apps for Enterprise, Microsoft Office 2019, Microsoft Office 2021, and other specific Microsoft Office versions.
What type of vulnerability is CVE-2026-64911 categorized as?
CVE-2026-64911 is categorized as an integer overflow vulnerability.