CVE-2026-47290

Analyzed Analyzed - Analysis Complete

Use After Free in Microsoft Office Allows Remote Code Execution

Publication date: 2026-07-14

Last updated on: 2026-07-16

Assigner: Microsoft Corporation

Description

Use after free in Microsoft Office allows an unauthorized attacker to execute code locally.

CVSS Scores

EPSS Scores

Probability:
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Meta Information

Published

2026-07-14

Last Modified

2026-07-16

Generated

2026-08-03

AI Q&A

2026-07-15

EPSS Evaluated

2026-08-02

NVD

CVE-2026-47290

EUVD

EUVD-2026-44152

Affected Vendors & Products

Vendor	Product	Version / Range
microsoft	365_apps	*
microsoft	365_apps	*
microsoft	office_2019	*
microsoft	office_2019	*
microsoft	office_2016	*
microsoft	office_2016	*
microsoft	office_2021	*
microsoft	office_2021	*
microsoft	office_2024	*
microsoft	office_2024	*

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-416	The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.

Attack-Flow Graph

Executive Summary

This is a use-after-free vulnerability in Microsoft Office. It allows an unauthorized attacker to execute arbitrary code on a victim's system by exploiting a memory corruption issue after an object is freed but still accessed.

Detection Guidance

Detection of this vulnerability requires monitoring for unusual behavior in Microsoft Office applications, such as crashes or unexpected code execution. Check for updates from Microsoft to patch the issue. No specific commands are provided in the available resources.

Impact Analysis

An attacker could exploit this to run malicious code on your computer, potentially stealing data, installing malware, or taking control of your system. It requires user interaction, such as opening a specially crafted file.

Compliance Impact

This vulnerability could lead to unauthorized data access or exfiltration, violating GDPR (data protection) and HIPAA (health data privacy) requirements. Organizations must patch systems to maintain compliance.

Mitigation Strategies

Apply the latest security updates from Microsoft for Office products as soon as possible to patch the use-after-free vulnerability.

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