CVE-2026-88167: Microsoft Office Word Information Disclosure Vulnerability
Buffer over-read in Microsoft Office Word allows an unauthorized attacker to disclose information over a network.
Other sources
Microsoft Office Word Information Disclosure Vulnerability
— 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 must an attacker do to exploit this issue?
The attacker must cause a user to interact with malicious content. The vulnerability is network-reachable and does not require attacker privileges.
What is the likely security impact?
Successful exploitation can disclose information because of a buffer over-read in Word. The supplied scoring indicates high confidentiality impact, with no indicated integrity or availability impact.
Which Office deployments are listed as affected?
The affected software list includes Microsoft 365 Apps for Enterprise; Microsoft Office 365 for Mac; Office LTSC for Mac 2021 and 2024; and Office LTSC 2021 and 2024 for 32-bit and 64-bit editions.