CVE-2026-81394: Microsoft Excel Information Disclosure Vulnerability
Exposure of sensitive system information to an unauthorized control sphere in Microsoft Office Excel allows an unauthorized attacker to disclose information locally.
Other sources
Microsoft Excel Information Disclosure 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 16.0.5569.1003Patch KB5002904 - Upgrade
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Fixed in 16.113.26091433 - Upgrade
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Fixed in 16.0.17932.20976 - Upgrade
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Fixed in 16.0.14334.20906 - Upgrade
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Fixed in 16.0.5569.1003Patch KB5002914 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 16.0.20326.20138 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 16.0.10417.20207
Event History
Frequently Asked Questions
What access and user interaction are required for exploitation?
Exploitation is local and requires user interaction. The vector indicates no privileges are required, but an attacker would need to cause a user to interact with the malicious content or scenario.
What is the likely security impact if exploitation succeeds?
Successful exploitation can disclose sensitive system information. The provided impact metrics indicate high confidentiality impact, with no integrity or availability impact.
Which Microsoft Excel and Office releases are listed as affected?
The affected software list includes Microsoft Office 2016, Microsoft Excel 2016, Microsoft 365 Apps for Enterprise, Microsoft Office 365 for Mac, Microsoft Office LTSC for Mac 2024, Microsoft Office LTSC 2021 for 32-bit editions, and Microsoft Office LTSC 2024 for both 32-bit and 64-bit editions.