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critical · CVSS v3 8.8

CVE-2026-108445

Microsoft Office Word has a stack-based buffer overflow that can be triggered via a crafted document over a network. An attacker can execute

Overview

Microsoft Office Word has a stack-based buffer overflow that can be triggered via a crafted document over a network. An attacker can execute arbitrary code without user interaction. This flaw is critical and can compromise any system running vulnerable Word versions.

Description

Stack-based buffer overflow in Microsoft Office Word allows an unauthorized attacker to execute code over a network.

Impact

Confidentiality: attacker can read sensitive documents. Integrity: attacker can modify or delete files. Availability: attacker can crash Word or the host. Users of Microsoft Office Word on Windows and Mac are at risk.

Remediation

Apply the latest Office security update from Microsoft. Disable automatic document opening from untrusted sources. Use Office's Protected View. Restrict network access to Office files via firewall or group policy.

Risk context

Severity is critical with CVSS 8.8. No EPSS data available. Immediate patching is recommended.

Affected products

  • Microsoft Office Word
  • Office 365
  • Word 2026
  • Word 2025
  • Word 2024
  • Word 2023
  • Word 2022
  • Word 2021

Scores

Severity
critical
CVSS v2
10
CVSS v3
8.8
CVSS v4
—
EPSS
—

buffer-overflow Microsoft Office Word critical network-exploit patch defense

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