CVE-2026-80087: Microsoft Office Information Disclosure Vulnerability
Heap-based buffer overflow in Microsoft Office allows an unauthorized attacker to disclose information over a network.
Other sources
Microsoft Office 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 16.0.17932.20960 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 16.0.5569.1000Patch KB5002916 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 16.0.14334.20896 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 16.0.20326.20136 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 16.0.10417.20204
Event History
Frequently Asked Questions
Does exploitation require an attacker to have an account or elevated privileges?
No. The vulnerability is rated with no privileges required and network attack vector, but it does require user interaction.
What is the expected security impact if exploitation succeeds?
The stated impact is information disclosure, with high confidentiality impact. The supplied severity vector indicates no integrity or availability impact.
Which Office deployments should be prioritized for review?
Review Microsoft Office 2016, Microsoft 365 Apps for Enterprise, Office 2019 64-bit, Office LTSC 2021 32-bit, Office LTSC 2024 32-bit and 64-bit, Office LTSC for Mac 2024, and Office 365 for Mac. The provided data does not identify affected build numbers or a fixed version.