CVE-2026-70313

Analyzed Analyzed - Analysis Complete

Improper Input Validation in Microsoft Office PowerPoint

Publication date: 2026-08-11

Last updated on: 2026-08-14

Assigner: Microsoft Corporation

Description

Improper input validation in Microsoft Office PowerPoint allows an unauthorized attacker to disclose information locally.

CVSS Scores

EPSS Scores

Probability:
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Meta Information

Published

2026-08-11

Last Modified

2026-08-14

Generated

2026-09-01

AI Q&A

2026-08-11

EPSS Evaluated

2026-08-30

NVD

CVE-2026-70313

EUVD

EUVD-2026-56569

Affected Vendors & Products

Vendor	Product	Version / Range
microsoft	365_apps	*
microsoft	365_apps	*
microsoft	office_2019	*
microsoft	office_2019	*
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-20	The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.

Attack-Flow Graph

Executive Summary

This vulnerability is an improper input validation flaw in Microsoft Office PowerPoint. It allows an unauthorized attacker to disclose information locally by exploiting how PowerPoint processes certain inputs.

Detection Guidance

This vulnerability involves improper input validation in Microsoft Office PowerPoint leading to local information disclosure. Detection may require monitoring for suspicious PowerPoint file processing or unusual system behavior. Check for unauthorized access to sensitive files or unexpected PowerPoint process activity. Review system logs for PowerPoint-related errors or crashes.

Impact Analysis

An attacker could exploit this to access sensitive information stored on your local system through PowerPoint files. This may include documents, notes, or other data processed by the application.

Compliance Impact

This vulnerability allows unauthorized local information disclosure in Microsoft Office PowerPoint due to improper input validation. Such disclosure could potentially expose sensitive data, which may impact compliance with standards like GDPR (data protection) or HIPAA (health information privacy) if the disclosed data includes regulated information.

Mitigation Strategies

Apply the latest security updates from Microsoft for Office PowerPoint as soon as possible to address the improper input validation issue.

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