CVE-2026-108444

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Microsoft Office Remote Code Execution Vulnerability

Publication date: 2026-10-15

Last updated on: 2026-10-17

Assigner: Microsoft Corporation

Description

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

CVSS Scores

EPSS Scores

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Meta Information

Published

2026-10-15

Last Modified

2026-10-17

Generated

2026-10-19

AI Q&A

2026-10-16

EPSS Evaluated

2026-10-18

NVD

CVE-2026-108444

Affected Vendors & Products

Vendor	Product	Version / Range
Microsoft	Microsoft	365 Apps for Enterprise 16.0.1
Microsoft	Microsoft	Office 365 for Mac 1.0.0
Microsoft	Microsoft	Office LTSC 2021 16.0.1
Microsoft	Microsoft	Office LTSC 2024 16.0.0
Microsoft	Microsoft	Office LTSC for Mac 2021 16.0.1
Microsoft	Microsoft	Office LTSC for Mac 2024 16.0.0

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-122	A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc().

Attack-Flow Graph

Executive Summary

This is a heap-based buffer overflow vulnerability in Microsoft Office. It allows an unauthorized attacker to execute arbitrary code over a network by exploiting a flaw in memory handling.

Detection Guidance

Detecting this heap-based buffer overflow in Microsoft Office requires monitoring for unusual memory usage or crashes in Office applications. Check for Office process crashes (e.g., WINWORD.EXE, EXCEL.EXE) and inspect network traffic for suspicious payloads targeting Office file formats. Enable Windows Error Reporting to capture crash dumps for analysis.

Impact Analysis

An attacker could exploit this to run malicious code on your system, potentially stealing data, installing malware, or taking control of your computer without your knowledge.

Compliance Impact

This vulnerability could lead to unauthorized data access or exfiltration, violating GDPR and HIPAA requirements for data protection and confidentiality.

Mitigation Strategies

Apply the latest security updates from Microsoft immediately to patch the heap-based buffer overflow in Microsoft Office. Disable Office macros from untrusted sources and restrict network access to Office applications until patched.

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