CVE-2026-105592: Microsoft Office Access heap-based buffer overflow

CVE-2026-105592 · Severity: high · CVSS 7.5 · Published 2026-10-13

Microsoft Office Access, a database management application used by businesses to store and manage data, contains a heap-based buffer overflow vulnerability that allows an attacker to execute malicious code remotely. An attacker could exploit this flaw by sending a specially crafted file over the network, potentially gaining unauthorized access to sensitive business data or taking control of affected systems.

Technologies: Microsoft 365 Apps, Microsoft Office 2021, Microsoft Office 2024, Microsoft Office Access. Vendors: Microsoft.

Quick answers

Is CVE-2026-105592 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-105592 being exploited in the wild.
How severe is CVE-2026-105592?
High severity, with a CVSS score of 7.5, published 13 October 2026.
Which products and versions are affected?
Microsoft Office Access.
Is there a fix for CVE-2026-105592?
No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2026-105592 attacked?
It is attacked over the network, in a web application.
Am I affected by CVE-2026-105592?
Check whether you run Microsoft 365 Apps, Microsoft Office 2021, Microsoft Office 2024 or one of the others listed. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

A heap-based buffer overflow in Microsoft Office Access permits remote code execution when processing specially crafted input. The vulnerability is reachable over a network, allowing an attacker to achieve arbitrary code execution without authentication. A fix has been published by Microsoft.

Affected products

  • Microsoft Office Access

Timeline

  • 2026-10-13: disclosed

References

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