CVE-2026-55132

Analyzed Analyzed - Analysis Complete

Double Free in Microsoft Office Word Allows Code Execution

Publication date: 2026-07-14

Last updated on: 2026-07-16

Assigner: Microsoft Corporation

Description

Double free in Microsoft Office Word allows an unauthorized attacker to execute code locally.

CVSS Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published

2026-07-14

Last Modified

2026-07-16

Generated

2026-08-04

AI Q&A

2026-07-15

EPSS Evaluated

2026-08-02

NVD

CVE-2026-55132

EUVD

EUVD-2026-44201

Affected Vendors & Products

Vendor	Product	Version / Range
microsoft	sharepoint_server	2019
microsoft	sharepoint_server	2016
microsoft	365_apps	*
microsoft	365_apps	*
microsoft	word	2016
microsoft	word	2016
microsoft	office_2019	*
microsoft	office_2019	*
microsoft	microsoft_365	*
microsoft	office_2021	*
microsoft	office_2021	*
microsoft	office_2021	*
microsoft	office_2024	*
microsoft	office_2024	*
microsoft	office_2024	*
microsoft	sharepoint_server	to 16.0.19725.20434 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-415	The product calls free() twice on the same memory address.

Attack-Flow Graph

Executive Summary

This vulnerability is a double free issue in Microsoft Office Word. A double free occurs when a program frees the same memory location twice, which can lead to memory corruption and allow an attacker to execute arbitrary code on the affected system.

Impact Analysis

An attacker could exploit this vulnerability to run malicious code on your computer, potentially allowing them to take control of your system, steal data, or install malware without your knowledge.

Compliance Impact

This vulnerability allows unauthorized code execution locally, which could lead to unauthorized access to sensitive data. This may impact compliance with GDPR (data protection) and HIPAA (health information privacy) if exploited to access or exfiltrate protected data.

Mitigation Strategies

Apply the latest security updates from Microsoft for Office Word as soon as possible to patch the double free vulnerability.

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