CVE-2026-70320

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

2026-08-12

EPSS Evaluated

2026-08-30

NVD

CVE-2026-70320

EUVD

EUVD-2026-56579

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.

Impact Analysis

An attacker could exploit this to access sensitive information stored on your local system through PowerPoint files. This could include documents, data, or other confidential material.

Compliance Impact

This vulnerability allows local information disclosure due to improper input validation in Microsoft Office PowerPoint. While it does not directly impact GDPR or HIPAA compliance, unauthorized information disclosure could lead to violations if sensitive data is exposed. Organizations should assess potential data exposure risks and apply mitigations.

Mitigation Strategies

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

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