CVE-2026-105591: Microsoft Office Access Remote Code Execution Vulnerability
Heap-based buffer overflow in Microsoft Office Access allows an unauthorized attacker to execute code over a network.
Other sources
Microsoft Office Access 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 16.0.14334.20974 - 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
What does an attacker need to exploit this issue?
The attack can be conducted over a network and does not require attacker privileges. Exploitation requires user interaction.
Which deployments should be included in initial triage?
Review systems running Microsoft 365 Apps for Enterprise, Microsoft Office Access, or Microsoft Office LTSC 2021 or 2024 in either 32-bit or 64-bit editions. The provided data does not identify affected build numbers or fixed versions.