CVE-2026-97750

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

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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-2026-97750

EUVD

EUVD-2026-99809

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-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 inputs.

Detection Guidance

Detecting this vulnerability requires monitoring for unusual Excel file behavior or network traffic anomalies. Use Microsoft Defender for Office 365 to scan files and enable network traffic inspection tools like Wireshark to detect suspicious Excel-related network activity. Check for crashes or memory corruption in Excel processes using Windows Event Viewer.

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, installation of malware, or unauthorized system access. The impact depends on user privileges and system configuration.

Compliance Impact

This vulnerability allows remote code execution via a stack-based buffer overflow in Microsoft Office Excel. Such vulnerabilities can lead to unauthorized data access, modification, or exfiltration, which may violate data protection requirements under GDPR and HIPAA if sensitive data is compromised.

Mitigation Strategies

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

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