CVE-2026-68803

Analyzed Analyzed - Analysis Complete

Type Confusion in Microsoft Office Excel

Publication date: 2026-08-11

Last updated on: 2026-08-13

Assigner: Microsoft Corporation

Description

Access of resource using incompatible type ('type confusion') in Microsoft Office Excel allows an unauthorized attacker to execute code locally.

CVSS Scores

EPSS Scores

Probability:
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Meta Information

Published

2026-08-11

Last Modified

2026-08-13

Generated

2026-09-01

AI Q&A

2026-08-11

EPSS Evaluated

2026-08-30

NVD

CVE-2026-68803

EUVD

EUVD-2026-56757

Affected Vendors & Products

Vendor	Product	Version / Range
microsoft	365_apps	*
microsoft	365_apps	*
microsoft	excel	2016
microsoft	excel	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	*

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-843	The product allocates or initializes a resource such as a pointer, object, or variable using one type, but it later accesses that resource using a type that is incompatible with the original type.

Attack-Flow Graph

Executive Summary

This vulnerability is a type confusion issue in Microsoft Office Excel. It allows an unauthorized attacker to execute code locally by exploiting a flaw where the software accesses a resource using incompatible data types.

Impact Analysis

An attacker could exploit this to run malicious code on your system, potentially leading to unauthorized access, data theft, or further compromise of your device. It requires user interaction, such as opening a specially crafted file.

Compliance Impact

This vulnerability allows unauthorized code execution locally, which could lead to unauthorized access or data exfiltration. For GDPR, this may impact data confidentiality and integrity requirements. For HIPAA, it could compromise protected health information if exploited.

Mitigation Strategies

Apply the latest security updates from Microsoft for Office Excel as soon as possible to patch the type confusion vulnerability. Disable macros from untrusted sources and restrict Excel file execution from suspicious locations.

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