CVE-2026-105593

Summary

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

Exploitability

Exploitation appears moderately difficult as it requires a remote attacker to craft a malicious file that triggers the buffer overflow, but the attack surface is large due to the prevalence of Access files in enterprise environments.

Blast radius

The impact could be significant across organizations using Office 2021 or Office 2024, especially those with shared network drives or email systems where Access files might be opened automatically.

Detection

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

Prioritized remediation

Deploy the Microsoft Office 2024 update KB5039678 or Microsoft Office 2021 update KB5039679 immediately to address this vulnerability.

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