CVE-2026-88201

Analyzed Analyzed - Analysis Complete

Buffer Over-Read in Microsoft Office Excel

Publication date: 2026-10-13

Last updated on: 2026-10-14

Assigner: Microsoft Corporation

Description

Buffer over-read in Microsoft Office Excel allows an unauthorized attacker to disclose information over a network.

CVSS Scores

EPSS Scores

Probability:
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Meta Information

Published

2026-10-13

Last Modified

2026-10-14

Generated

2026-10-19

AI Q&A

2026-10-14

EPSS Evaluated

2026-10-18

NVD

CVE-2026-88201

EUVD

EUVD-2026-99734

Affected Vendors & Products

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

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-126	The product reads from a buffer using buffer access mechanisms such as indexes or pointers that reference memory locations after the targeted buffer.

Attack-Flow Graph

Executive Summary

This vulnerability is a buffer over-read in Microsoft Office Excel. It allows an unauthorized attacker to access and disclose information over a network without needing special privileges or user interaction.

Impact Analysis

An attacker could exploit this to read sensitive data from memory, potentially exposing confidential information such as documents or personal data stored in Excel files.

Compliance Impact

This vulnerability could lead to unauthorized data exposure, which may violate GDPR (data protection) and HIPAA (health information privacy) by allowing access to protected or sensitive information.

Mitigation Strategies

Apply the latest security updates from Microsoft for Microsoft Office Excel as soon as possible to patch the buffer over-read vulnerability.

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