CVE-2026-88175: 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 16.0.17932.21056 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 16.0.14334.20974 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in https://aka.ms/OfficeSecurityReleases
Event History
Frequently Asked Questions
What does an attacker need to exploit this issue?
The attack vector is network-based, requires no privileges, and has low attack complexity. However, exploitation requires user interaction.
What is the likely impact of successful exploitation?
Successful exploitation can disclose information from Microsoft Office Excel. The available scoring indicates high confidentiality impact, with no integrity or availability impact.
Which Office deployments are listed as affected?
The affected software list includes Microsoft 365 Apps for Enterprise; Microsoft Office LTSC 2021 and 2024 in both 32-bit and 64-bit editions; and Microsoft Office 365 for Mac.