CVE-2026-70287

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 possible to achieve remote code execution through social engineering or phishing attacks.

Blast radius

If exploited, this vulnerability could allow attackers to execute code on any Windows system running affected versions of Microsoft Office, potentially leading to full system compromise and lateral movement across networks.

Detection

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

Prioritized remediation

Deploy the Microsoft Office 2021 or Office 2024 update KB5043698 immediately, as this patch addresses the heap-based buffer overflow vulnerability in Word.

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