CVE-2026-78513

Analyzed Analyzed - Analysis Complete

Out-of-Bounds Read in Microsoft Office PowerPoint

Publication date: 2026-09-08

Last updated on: 2026-09-09

Assigner: Microsoft Corporation

Description

Out-of-bounds read in Microsoft Office PowerPoint allows an unauthorized attacker to disclose information locally.

CVSS Scores

EPSS Scores

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Meta Information

Published

2026-09-08

Last Modified

2026-09-09

Generated

2026-09-29

AI Q&A

2026-09-09

EPSS Evaluated

2026-09-27

NVD

CVE-2026-78513

Affected Vendors & Products

Vendor	Product	Version / Range
microsoft	365_apps	*
microsoft	365_apps	*
microsoft	office_2019	*
microsoft	office_2019	*
microsoft	powerpoint	2016
microsoft	powerpoint	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-125	The product reads data past the end, or before the beginning, of the intended buffer.

Attack-Flow Graph

Executive Summary

This vulnerability is an out-of-bounds read issue in Microsoft Office PowerPoint. It allows an unauthorized attacker to access and disclose information stored locally on a system by exploiting this flaw.

Impact Analysis

An attacker could exploit this to read sensitive data from your system, such as files or memory contents, potentially leading to unauthorized information disclosure. This requires local access but could expose confidential data.

Compliance Impact

This vulnerability could lead to unauthorized data exposure, violating compliance requirements like GDPR (data protection) or HIPAA (health information privacy). Organizations may face penalties if such breaches occur due to unpatched systems.

Mitigation Strategies

Apply the latest security updates from Microsoft for PowerPoint to patch the out-of-bounds read vulnerability. Disable file sharing or restrict access to PowerPoint files from untrusted sources until patched.

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