CVE-2026-97779: Microsoft Office Excel Information Disclosure Vulnerability
Microsoft Office Excel Information Disclosure Vulnerability
Other sources
Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to disclose information over a network.
— 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 16.0.10417.20228Patch KB5002928 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in https://aka.ms/OfficeSecurityReleases - Upgrade
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Fixed in 16.0.17932.21056 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 16.0.14334.20974
Event History
Frequently Asked Questions
Does exploitation require an authenticated account or local access?
No. The vector indicates network reachability and no privileges required (AV:N/PR:N), although user interaction is required (UI:R).
What security impact is indicated beyond information exposure?
The supplied vector rates confidentiality impact as high (C:H) and indicates no integrity or availability impact (I:N/A:N).
Which Microsoft product deployments are listed as affected?
The affected software list includes Microsoft 365 Apps for Enterprise, Microsoft Office Excel, Microsoft Office Online Server, Microsoft Office 365 for Mac, Office LTSC 2024 for 32-bit and 64-bit editions, Office LTSC for Mac 2024, and Office LTSC for Mac 2021.