Use of Uninitialized Resource in Microsoft Office Discloses Information

Publication date: 2026-09-08

Last updated on: 2026-09-10

Assigner: Microsoft Corporation

Description

Use of uninitialized resource in Microsoft Office allows an unauthorized attacker to disclose information over a network.

CVSS Scores

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Meta Information

Published

2026-09-08

Last Modified

2026-09-10

Generated

2026-09-29

AI Q&A

2026-09-09

EPSS Evaluated

2026-09-27

NVD

CVE-2026-80091

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	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-908	The product uses or accesses a resource that has not been initialized.

Attack-Flow Graph

Executive Summary

This vulnerability involves the use of an uninitialized resource in Microsoft Office. An attacker could exploit this to disclose information over a network without authorization.

Impact Analysis

An unauthorized attacker may access sensitive information transmitted over a network due to improper handling of uninitialized resources in Microsoft Office.

Mitigation Strategies

Apply the latest security updates from Microsoft for Office products to address the uninitialized resource issue. Monitor Microsoft's security advisories for patches and implement network monitoring to detect unusual information disclosure attempts.

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