Summary
Impact: Remote Code Execution. Microsoft rating: Important. Not known to be exploited — Exploitation Less Likely. Customer action: Required.
Details
Is the Preview Pane an attack vector for this vulnerability?
No, the Preview Pane is not an attack vector.
How could an attacker exploit this vulnerability?
An attacker could provide a specially crafted database and convince a user to open it in Microsoft Access and drag an object from the database to another application. Successful exploitation could allow the attacker to execute code with the user's permissions. The attacker does not need an account on the affected system.
Security updates
16.0.14334.21048 — https://docs.microsoft.com/en-us/officeupdates/microsoft365-apps-security-updates
https — https://learn.microsoft.com/en-us/officeupdates/microsoft365-apps-security-updates
Vulnerabilities 1
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High 8.8
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.
Revision history
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#1
Information published.
References
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CVE-2026-109493 Microsoft Office Access Remote Code Execution Vulnerability - HTML
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-109493
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Microsoft Exploitability Index
https://www.microsoft.com/en-us/msrc/exploitability-index?rtc=1
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Microsoft Support Lifecycle
https://support.microsoft.com/lifecycle
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Common Vulnerability Scoring System
https://www.first.org/cvss