CVE-2026-81400: Microsoft Excel Information Disclosure Vulnerability
Microsoft Excel Information Disclosure Vulnerability
Other sources
Out-of-bounds read 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 KB5002904 - 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 16.0.17932.20960 - 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 16.0.20131.20246 - 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 must an attacker be able to do to exploit this issue?
The attack vector is local and requires user interaction. No privileges are required according to the supplied CVSS vector, but the data does not specify the exact interaction or delivery mechanism.
What is the expected impact if exploitation succeeds?
Successful exploitation can disclose information through an out-of-bounds read in Excel. The supplied CVSS metrics indicate high confidentiality impact, with no integrity or availability impact.
Which products should be included in scoping?
The affected software list includes Microsoft Office 2016, Microsoft 365 Apps for Enterprise, Microsoft Excel 2016, Microsoft Office 365 for Mac, Office LTSC 2021 for 64-bit editions, Office LTSC 2024 for 32-bit and 64-bit editions, and Office LTSC for Mac 2024.