CVE-2026-68800: Microsoft Excel Remote Code Execution Vulnerability
Heap-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
Other sources
Microsoft Excel 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 16.0.5565.1001Patch KB5002903 - 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 16.0.10417.20175Patch KB5002884
Event History
Frequently Asked Questions
What is the severity of CVE-2026-68800?
CVE-2026-68800 has a high severity rating of 7.8.
How do I fix CVE-2026-68800?
To fix CVE-2026-68800, update Microsoft Excel and Microsoft Office applications to the latest versions provided by Microsoft.
What products are affected by CVE-2026-68800?
CVE-2026-68800 affects Microsoft Excel 2016, Microsoft 365 Apps for Enterprise, Microsoft Office 2019, Microsoft Office 2021, Microsoft Office 2024, and Microsoft Office 365 for Mac.
What type of vulnerability is CVE-2026-68800?
CVE-2026-68800 is a heap-based buffer overflow vulnerability.
What can an attacker do with CVE-2026-68800?
An attacker can execute code locally on a victim's machine through CVE-2026-68800.