CVE-2026-68795

Analyzed Analyzed - Analysis Complete

Stack-based Buffer Overflow in Microsoft Office Excel

Publication date: 2026-08-11

Last updated on: 2026-08-13

Assigner: Microsoft Corporation

Description

Stack-based buffer overflow 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

2026-08-12

EPSS Evaluated

2026-08-30

NVD

CVE-2026-68795

EUVD

EUVD-2026-56454

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-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 on a victim's system by exploiting a flaw in how Excel processes certain data.

Detection Guidance

Detection of this vulnerability requires checking for unpatched versions of Microsoft Office Excel. Use the following commands to verify installed versions and updates: On Windows, run 'wmic product get name,version' in Command Prompt to list installed software. Check if Excel version is below the patched release. Alternatively, use PowerShell: 'Get-WmiObject -Class Win32_Product | Where-Object {$_.Name -like "*Excel*"}' to list Excel installations and their versions.

Impact Analysis

An attacker could exploit this to run malicious code on your computer, potentially stealing data, installing malware, or taking control of your system. This requires the attacker to trick you into opening a specially crafted Excel file.

Compliance Impact

The vulnerability allows unauthorized code execution locally, which could lead to unauthorized access or data exfiltration. This may impact compliance with GDPR (data protection) and HIPAA (health data security) by increasing risk of breaches or unauthorized data access.

Mitigation Strategies

Apply the latest security updates from Microsoft for Office Excel as soon as possible to patch the stack-based buffer overflow vulnerability.

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