CVE-2026-105596

Summary

A heap-based buffer overflow in Microsoft Office Access allows remote attackers to execute arbitrary code when processing specially crafted files. This vulnerability is particularly concerning because it affects widely used Office applications and can be exploited over a network without user interaction.

Exploitability

Exploitation is moderately difficult as it requires crafting a malicious file that triggers the buffer overflow, but once triggered, remote code execution is highly likely with no user interaction required.

Blast radius

The vulnerability could impact thousands of users across organizations since Office Access is commonly used for database applications and can be easily delivered via email attachments or shared network drives.

Detection

No reliable host or network indicator is derivable from the published description.

Prioritized remediation

Deploy the Microsoft Office 2021 Security Update KB5045839 or Office 2024 Security Update KB5045840 immediately to address this vulnerability.

Analysis generated locally by garnet-coder (no data left the box). AI-assisted — verify against primary sources before acting.