CVE-2026-97772

Analyzed Analyzed - Analysis Complete

Double Free in Microsoft Office Excel Allows Code Execution

Publication date: 2026-10-13

Last updated on: 2026-10-15

Assigner: Microsoft Corporation

Description

Double free in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.

CVSS Scores

EPSS Scores

Probability:
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Meta Information

Published

2026-10-13

Last Modified

2026-10-15

Generated

2026-10-19

AI Q&A

2026-10-14

EPSS Evaluated

2026-10-18

NVD

CVE-2026-97772

EUVD

EUVD-2026-100303

Affected Vendors & Products

Vendor	Product	Version / Range
microsoft	365_apps	*
microsoft	365_apps	*
microsoft	microsoft_365	*
microsoft	office_2021	*
microsoft	office_2021	*
microsoft	office_2021	*
microsoft	office_2024	*
microsoft	office_2024	*
microsoft	office_2024	*
microsoft	office_online_server	to 16.0.10417.20228 (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 Excel. A double free occurs when a program frees the same memory block twice, which can lead to memory corruption and potentially allow an attacker to execute arbitrary code remotely over a network.

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. It requires user interaction, such as opening a specially crafted file.

Compliance Impact

This vulnerability allows remote code execution via a double free in Microsoft Office Excel, which could lead to unauthorized access or data breaches. Such breaches may violate compliance requirements under GDPR (data protection) and HIPAA (health data security) if sensitive data is exposed or altered.

Mitigation Strategies

Apply the latest security updates from Microsoft to patch the double free vulnerability in Microsoft Office Excel. Monitor Microsoft's official security advisories for updates and ensure all affected systems are updated promptly.

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