CVE-2026-108448: Microsoft Office Outlook Remote Code Execution Vulnerability
Heap-based buffer overflow in Microsoft Office Outlook allows an unauthorized attacker to execute code over a network.
Other sources
Microsoft Office Outlook Remote Code Execution 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 16.114.26101123 - 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 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 16.0.14334.20974
Event History
Frequently Asked Questions
What attacker interaction is required for exploitation?
Exploitation is network-based and requires no attacker privileges, but it does require user interaction. The attack complexity is rated high.
Which Outlook deployments are identified 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, and Office LTSC for Mac 2021 and 2024.
What impact could successful exploitation have?
A successful heap-based buffer overflow could allow an unauthorized attacker to execute code. The supplied severity vector rates confidentiality, integrity, and availability impact as high.