CVE-2026-40362: Microsoft Excel Remote Code Execution Vulnerability
Microsoft Excel Remote Code Execution Vulnerability
Other sources
Use after free in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
— 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 16.109.26051019 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 16.0.5552.1000Patch KB5002865 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 16.0.10417.20128Patch KB5002871
Event History
Frequently Asked Questions
What is the severity of CVE-2026-40362?
CVE-2026-40362 is classified as a critical vulnerability due to its potential for remote code execution.
How do I fix CVE-2026-40362?
To fix CVE-2026-40362, update to the latest version of Microsoft Excel as recommended by Microsoft.
What are the affected software for CVE-2026-40362?
CVE-2026-40362 affects Microsoft Office LTSC 2024, 2021, 2019, Excel 2016, and Office for Mac.
Can CVE-2026-40362 be exploited remotely?
Yes, CVE-2026-40362 can be exploited remotely by an unauthorized attacker to execute code.
What type of vulnerability is CVE-2026-40362?
CVE-2026-40362 is a heap-based buffer overflow vulnerability in Microsoft Excel.