CVE-2026-70302

Summary

A heap-based buffer overflow in Microsoft Word allows remote attackers to execute arbitrary code when processing maliciously crafted documents over a network. This vulnerability could enable attackers to gain full control of affected systems.

Exploitability

Exploitation requires a user to open a specially crafted Word document, making it moderately difficult but not highly complex to achieve, with no privileged access required.

Blast radius

If exploited, this vulnerability could allow attackers to execute code on any system running vulnerable versions of Microsoft Office Word, potentially affecting thousands of users across an organization.

Detection

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

Prioritized remediation

Deploy the Microsoft Security Update KB5042398 immediately to all affected systems running Office 2021 or Office 2024.

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