CVE-2026-70315

Analyzed Analyzed - Analysis Complete

Out-of-bounds Read in Microsoft Office

Publication date: 2026-08-11

Last updated on: 2026-08-14

Assigner: Microsoft Corporation

Description

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

CVSS Scores

EPSS Scores

Probability:
Percentile:

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-2026-70315

EUVD

EUVD-2026-56572

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-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. It allows an unauthorized attacker to access and disclose information stored on the local system by reading beyond the intended memory boundaries in the software.

Detection Guidance

This vulnerability is an out-of-bounds read in Microsoft Office that allows local information disclosure. Detection typically involves checking for unusual application behavior or crashes in Microsoft Office products. Monitor for Office application crashes or unexpected memory access patterns. Ensure all Microsoft Office updates are applied to mitigate the risk.

Impact Analysis

An attacker could exploit this to read sensitive data from your system, such as documents or files, even without elevated privileges. This could lead to unauthorized information disclosure.

Compliance Impact

This vulnerability could lead to unauthorized access to personal or sensitive data, potentially violating GDPR (data protection) and HIPAA (health information privacy) requirements. Organizations may face compliance violations if exploited.

Mitigation Strategies

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

Hi! I’m here to help you understand CVE-2026-70315. Ask me anything about the vulnerability, its impact, or mitigation strategies.

0/70