CVE-2026-65664
Received Received - Intake

Heap-based Buffer Overflow in Microsoft Office

Publication date: 2026-08-11

Last updated on: 2026-08-11

Assigner: Microsoft Corporation

Description
Heap-based buffer overflow in Microsoft Office allows an unauthorized attacker to execute code locally.

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Meta Information

Published
2026-08-11
Last Modified
2026-08-11
Generated
2026-08-11
AI Q&A
2026-08-11
EPSS Evaluated
N/A
NVD
CVE-2026-65664
EUVD
EUVD-2026-56432

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
microsoft office *

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-122 A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc().

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Executive Summary

This is a heap-based buffer overflow vulnerability in Microsoft Office. It allows an unauthorized attacker to execute arbitrary code on a local system by exploiting memory corruption in the application.

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 like opening a specially crafted file.

Mitigation Strategies

Apply the latest security updates from Microsoft for Office products immediately. Disable Office macros if not required and restrict user permissions to minimize attack surface.

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