CVE-2026-81396: Microsoft Excel Remote Code Execution Vulnerability
Microsoft Excel Remote Code Execution Vulnerability
Other sources
Stack-based buffer overflow 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 16.0.17932.20960 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 16.0.5569.1003Patch KB5002914 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 16.0.20326.20136 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 16.0.5569.1003Patch KB5002904 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 16.0.10417.20204Patch KB5002910 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 16.0.14334.20896
Event History
Frequently Asked Questions
Which Excel and Office deployments are listed as affected?
The listed software includes Microsoft Excel 2016, Microsoft 365 Apps for Enterprise, Microsoft Office 2016, Office 2019 for 64-bit editions, Office LTSC 2021 for 64-bit editions, Office LTSC 2024 for 32-bit and 64-bit editions, and Office LTSC for Mac 2024.
Does exploitation require an attacker to already have access to the target system?
The vector is local and privileges are not required, so the attacker does not need pre-existing privileges. User interaction is required according to the supplied severity vector.
What is the potential impact if exploitation succeeds?
Successful exploitation can allow code execution locally. The supplied vector rates confidentiality, integrity, and availability impact as high.