CVE-2026-88192: 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
Does exploitation require the attacker to be authenticated?
No. The CVSS vector lists privileges required as none, so the attacker does not need an authenticated account or prior permissions.
What conditions are required for exploitation?
The attack vector is network-based and user interaction is required. This indicates that exploitation depends on a user interacting with attacker-supplied content or a network-delivered attack path.
What is the expected security impact?
The vulnerability is rated for high confidentiality impact. The supplied CVSS data lists no integrity or availability impact.