CVE-2026-88172: 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 https://aka.ms/OfficeSecurityReleases - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 16.0.14334.20974
Event History
Frequently Asked Questions
What must an attacker have or do to exploit this issue?
The attack can be conducted over a network with low attack complexity and does not require attacker privileges. However, it requires user interaction.
Can exploitation modify Excel data or disrupt service availability?
The provided impact metrics indicate high confidentiality impact, with no integrity or availability impact.
Which Excel installations are affected?
The available data identifies Microsoft Office Excel but does not specify affected versions, editions, configurations, or whether default installations are vulnerable.