CVE-2026-108444

Summary

A heap-based buffer overflow in Microsoft Office allows remote attackers to execute arbitrary code on vulnerable systems by tricking users into opening a specially crafted Office document over a network. This vulnerability could lead to full system compromise with high impact.

Exploitability

Exploitation requires a user to open a malicious Office document, making it moderately difficult but achievable through social engineering or phishing campaigns, with no privileged access required.

Blast radius

The vulnerability affects all users who can open Office documents over a network, potentially impacting thousands of endpoints across an organization when exploited.

Detection

Monitor for unusual network file access patterns to Office documents from external sources, particularly when users open files from shared drives or email attachments. Look for process creation events from Microsoft Office applications with suspicious command-line arguments or memory access violations in Windows Event Logs.

Prioritized remediation

Deploy Microsoft Office updates immediately, specifically the patch released in the July 2026 security update bulletin (KB5061234) which addresses this heap buffer overflow vulnerability.

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