CVE-2026-97008

Analyzed Analyzed - Analysis Complete

Buffer Underwrite in Microsoft Office Excel

Publication date: 2026-10-13

Last updated on: 2026-10-15

Assigner: Microsoft Corporation

Description

Buffer underwrite ('buffer underflow') in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.

CVSS Scores

EPSS Scores

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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-2026-97008

EUVD

EUVD-2026-100286

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-124	The product writes to a buffer using an index or pointer that references a memory location prior to the beginning of the buffer.

Attack-Flow Graph

Executive Summary

This is a buffer underwrite vulnerability in Microsoft Office Excel. It allows an unauthorized attacker to execute code remotely over a network by exploiting a flaw where data is written before the start of a buffer.

Impact Analysis

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

Compliance Impact

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

Mitigation Strategies

Apply the latest security updates from Microsoft for Office Excel and related products. Monitor Microsoft's security advisories for patches and install them promptly.

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