CVE-2026-80084: Microsoft Office Outlook Information Disclosure Vulnerability
Microsoft Office Outlook Information Disclosure Vulnerability
Other sources
Out-of-bounds read in Microsoft Office Outlook 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 16.0.17932.20960 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 16.0.5569.1002Patch KB5002898 - 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
Which Office installations are identified as affected?
The affected software list includes Microsoft Office 2016; Microsoft 365 Apps for Enterprise; Office 2019 for 32-bit and 64-bit editions; Office LTSC 2021 for 32-bit and 64-bit editions; and Office LTSC 2024 for 32-bit and 64-bit editions.
Does exploiting this issue require an authenticated account or user interaction?
The supplied vector indicates no privileges are required, but user interaction is required. The attack vector is network-based and the described impact is disclosure of information.
What security impact is indicated by the supplied severity vector?
The vector indicates high confidentiality impact, with no integrity or availability impact. It is rated medium severity with a CVSS score of 6.5.