CVE-2026-81391: Microsoft Excel Information Disclosure Vulnerability
Microsoft Excel Information Disclosure Vulnerability
Other sources
Use of uninitialized resource in Microsoft Office Excel allows an unauthorized attacker to disclose information 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 16.0.5569.1003Patch KB5002914 - 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 16.0.14334.20896 - 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 16.0.10417.20204Patch KB5002910 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 16.0.20326.20136
Event History
Frequently Asked Questions
What must an attacker be able to do to exploit this issue?
The attack requires local access and user interaction. No privileges are required according to the supplied CVSS vector.
Which Microsoft product lines are listed as affected?
The listed products are Microsoft Excel 2016, Microsoft Office 2016, Microsoft 365 Apps for Enterprise, Microsoft Office LTSC for Mac 2024, Microsoft Office LTSC 2021 for 64-bit editions, Microsoft Office LTSC 2024 for 32-bit editions and 64-bit editions, and Microsoft Office 365 for Mac.