CVE-2026-80091: Microsoft Office Information Disclosure Vulnerability
Microsoft Office Information Disclosure Vulnerability
Other sources
Use of uninitialized resource in Microsoft Office 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 16.0.5569.1000Patch KB5002916 - 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 16.0.20326.20136 - 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 16.0.10417.20204
Event History
Frequently Asked Questions
What must an attacker do to exploit this issue?
The attacker can attempt exploitation over a network without authentication or privileges, but user interaction is required. The available data does not specify the exact user action involved.
What is the security impact if exploitation succeeds?
Successful exploitation can disclose information. The supplied severity vector indicates high confidentiality impact, with no stated integrity or availability impact.
Which Office deployments are listed as affected?
The affected software list includes Office 2016, Office 2019 for 64-bit editions, Office LTSC 2021 for 32-bit editions, Office LTSC 2024 for 64-bit editions, Microsoft 365 Apps for Enterprise, Office 365 for Mac, Office LTSC for Mac 2021, and Office LTSC for Mac 2024.