CVE-2026-80087

Undergoing Analysis Undergoing Analysis - In Progress

Heap-based Buffer Overflow in Microsoft Office

Publication date: 2026-09-08

Last updated on: 2026-09-08

Assigner: Microsoft Corporation

Description

Heap-based buffer overflow in Microsoft Office allows an unauthorized attacker to disclose information over a network.

CVSS Scores

EPSS Scores

Probability:
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Meta Information

Published

2026-09-08

Last Modified

2026-09-08

Generated

2026-09-09

AI Q&A

2026-09-09

EPSS Evaluated

N/A

NVD

CVE-2026-80087

Affected Vendors & Products

Vendor	Product	Version / Range
microsoft	office	*

Helpful Resources

Exploitability

CWE

KEV

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().

Attack-Flow Graph

Executive Summary

This is a heap-based buffer overflow vulnerability in Microsoft Office. It allows an unauthorized attacker to disclose information over a network by exploiting memory corruption issues in the software.

Impact Analysis

An attacker could exploit this to access sensitive data stored or processed by Microsoft Office. This may lead to unauthorized information disclosure, potentially affecting confidentiality of documents or user data.

Compliance Impact

This vulnerability could lead to unauthorized data disclosure, violating confidentiality requirements in GDPR and HIPAA. Organizations may face compliance violations if sensitive data is exposed due to this flaw.

Mitigation Strategies

Apply the latest security updates from Microsoft for Office products. Disable unnecessary Office features that may be exposed to network input. Monitor network traffic for unusual patterns targeting Office applications.

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