CVE-2026-70282: 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 16.0.14334.20974 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 16.0.17932.21056
Event History
Frequently Asked Questions
What must an attacker do to exploit this issue?
The CVSS vector indicates that exploitation is network-reachable, requires low attack complexity, and does not require attacker privileges. User interaction is required.
Which environments should be prioritized for assessment?
Assess systems using Microsoft 365 Apps for Enterprise, Microsoft Office Outlook, Office LTSC 2021 for 32-bit or 64-bit editions, and Office LTSC 2024 for 32-bit or 64-bit editions.
What is the potential security impact if exploitation succeeds?
The provided CVSS metrics rate confidentiality, integrity, and availability impact as high. The vulnerability is a heap-based buffer overflow that can allow code execution.