CVE-2026-70281: 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 16.0.14334.20974 - 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 16.0.17932.21056
Event History
Frequently Asked Questions
Which Outlook and Office product families are listed as affected?
The affected software list includes Microsoft 365 Apps for Enterprise; Microsoft Office 365 for Mac; Office LTSC 2021 for 32-bit and 64-bit editions; Office LTSC 2024 for 32-bit and 64-bit editions; Office LTSC for Mac 2021; and Office LTSC for Mac 2024.
Does exploitation require authentication or user interaction?
No. The supplied severity vector indicates network-based exploitation with low attack complexity, no privileges required, and no user interaction required.
What is the stated impact if exploitation succeeds?
Successful exploitation can disclose information. The supplied vector rates confidentiality impact as high and indicates no integrity or availability impact.