CVE-2026-64919

Analyzed Analyzed - Analysis Complete

Microsoft Office Access Stack-Based Buffer Overflow

Publication date: 2026-08-11

Last updated on: 2026-08-14

Assigner: Microsoft Corporation

Description

Stack-based buffer overflow in Microsoft Office Access 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

2026-08-14

Generated

2026-09-01

AI Q&A

2026-08-11

EPSS Evaluated

2026-08-30

NVD

CVE-2026-64919

EUVD

EUVD-2026-56721

Affected Vendors & Products

Vendor	Product	Version / Range
microsoft	365_apps	*
microsoft	365_apps	*
microsoft	office_2019	*
microsoft	office_2019	*
microsoft	office_2021	*
microsoft	office_2021	*
microsoft	office_2024	*
microsoft	office_2024	*
microsoft	access	2016
microsoft	access	2016

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 Access. It allows an unauthorized attacker to execute arbitrary code on a local system by exploiting a flaw in how the software handles memory.

Detection Guidance

Detection requires monitoring for unusual activity in Microsoft Office Access processes. Check for crashes or unexpected behavior in Access.exe. Enable application logging for Office products and review event logs for access violations or buffer overflow errors.

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. It requires user interaction, such as opening a specially crafted file.

Compliance Impact

This vulnerability could lead to unauthorized access to sensitive data, violating GDPR and HIPAA requirements for data protection. Organizations may face compliance penalties if exploited.

Mitigation Strategies

Apply the latest security updates from Microsoft for Office Access immediately to patch the stack-based buffer overflow vulnerability.

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