CVE-2026-80084

Analyzed Analyzed - Analysis Complete

Out-of-Bounds Read in Microsoft Office Outlook

Publication date: 2026-09-08

Last updated on: 2026-09-10

Assigner: Microsoft Corporation

Description

Out-of-bounds read in Microsoft Office Outlook 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

2026-09-10

Generated

2026-09-29

AI Q&A

2026-09-10

EPSS Evaluated

2026-09-27

NVD

CVE-2026-80084

Affected Vendors & Products

Vendor	Product	Version / Range
microsoft	365_apps	*
microsoft	365_apps	*
microsoft	office_2019	*
microsoft	office_2019	*
microsoft	office_2016	*
microsoft	office_2016	*
microsoft	office_2021	*
microsoft	office_2021	*
microsoft	office_2024	*
microsoft	office_2024	*

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-125	The product reads data past the end, or before the beginning, of the intended buffer.

Attack-Flow Graph

Executive Summary

This is an out-of-bounds read vulnerability in Microsoft Office Outlook. It allows an unauthorized attacker to read memory outside the intended boundaries over a network, potentially exposing sensitive information.

Impact Analysis

An attacker could exploit this to access confidential data stored or processed by Outlook, such as emails or attachments. This may lead to data leaks or unauthorized information disclosure.

Compliance Impact

This vulnerability could result in non-compliance with GDPR or HIPAA if it leads to unauthorized access or disclosure of personal or health data. Organizations may face penalties or legal consequences for failing to protect such data.

Mitigation Strategies

Apply the latest security updates from Microsoft for Outlook as soon as they become available to patch the out-of-bounds read vulnerability.

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