CVE-2026-88184: 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 16.0.14334.20974 - 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 https://aka.ms/OfficeSecurityReleases
Event History
Frequently Asked Questions
What does an attacker need to do to exploit this issue?
The attacker can attempt exploitation over a network without prior privileges, but user interaction is required. The available data does not specify the exact user action or delivery method.
What is the potential impact if exploitation succeeds?
Successful exploitation can disclose information from Microsoft Office Excel. The provided severity metrics indicate high confidentiality impact, with no integrity or availability impact.