CVE-2026-97761

Analyzed Analyzed - Analysis Complete

Microsoft Office Excel Stack-Based Buffer Overflow

Publication date: 2026-10-13

Last updated on: 2026-10-15

Assigner: Microsoft Corporation

Description

Stack-based buffer overflow 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-2026-97761

EUVD

EUVD-2026-99820

Affected Vendors & Products

Vendor	Product	Version / Range
microsoft	365_apps	*
microsoft	365_apps	*
microsoft	microsoft_365	*
microsoft	office_2021	*
microsoft	office_2024	*
microsoft	office_2024	*
microsoft	office_2024	*

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-121	A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function).

Attack-Flow Graph

Executive Summary

This is a stack-based buffer overflow vulnerability in Microsoft Office Excel. It allows an unauthorized attacker to execute arbitrary code remotely over a network by exploiting a flaw in how Excel handles certain data.

Impact Analysis

An attacker could exploit this to run malicious code on your system if you open a specially crafted Excel file. This could lead to data theft, system compromise, or further network attacks.

Compliance Impact

This vulnerability allows remote code execution via a stack-based buffer overflow in Microsoft Office Excel. Such unauthorized code execution could lead to unauthorized access to sensitive data, which may violate compliance requirements under GDPR (data protection) and HIPAA (health information privacy).

Mitigation Strategies

Apply the latest security updates from Microsoft for affected Office Excel versions immediately. Disable Excel macros if not required and restrict network access to Excel files from untrusted sources.

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