CVE-2026-81388: 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 KB5002904 - 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 KB5002914 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 16.0.14334.20896 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 16.0.10417.20204Patch KB5002910
Event History
Frequently Asked Questions
What does an attacker need to exploit this vulnerability?
The attacker needs local access and user interaction, as reflected by the AV:L and UI:R metrics. No privileges are required before exploitation.
Which environments are identified as affected?
The listed affected software includes Microsoft Office 2016, Microsoft 365 Apps for Enterprise, Microsoft Excel 2016, Office LTSC 2024 for 32-bit and 64-bit editions, Office LTSC 2021 for 64-bit editions, and Office LTSC for Mac 2021 and 2024.
What is the potential impact if exploitation succeeds?
Successful exploitation can allow code execution locally. The supplied severity vector indicates high impact to confidentiality, integrity, and availability.