CVE-2026-88190: 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 interaction does an attacker need to exploit this issue?
The attacker does not need privileges, but exploitation requires user interaction. The issue can be exploited over a network.
What is the expected impact if exploitation succeeds?
Successful exploitation can disclose information from Microsoft Office Excel. The listed impact affects confidentiality, with no stated integrity or availability impact.