CVE-2026-70242: 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 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 access or interaction does an attacker need to exploit this issue?
The severity vector indicates network attack access, low attack complexity, no required privileges, and no user interaction. The description characterizes the attacker as unauthorized.
Which Outlook-related Office product lines are listed as affected?
The listed software includes Microsoft 365 Apps for Enterprise, Office LTSC 2024 for 32-bit and 64-bit editions, and Office LTSC 2021 for 32-bit and 64-bit editions.