CVE-2026-64899
Received Received - Intake

Out-of-Bounds Read in Microsoft Office

Vulnerability report for CVE-2026-64899, including description, CVSS score, EPSS score, affected products, exploitability, helpful resources, and attack-flow context.

Publication date: 2026-08-11

Last updated on: 2026-08-11

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
2026-08-11
Generated
2026-08-11
AI Q&A
2026-08-11
EPSS Evaluated
N/A
NVD
EUVD

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
microsoft office *

Helpful Resources

Exploitability

CWE
CWE Icon
KEV
KEV Icon
CWE ID Description
CWE-125 The product reads data past the end, or before the beginning, of the intended buffer.

Attack-Flow Graph

AI Quick Actions

Instant insights powered by AI
Executive Summary

This is an out-of-bounds read vulnerability in Microsoft Office. It allows an unauthorized attacker to access and disclose information stored locally on a system by reading beyond the intended memory boundaries of the application.

Impact Analysis

An attacker could exploit this to access sensitive data stored on your device, such as documents or files, potentially leading to unauthorized information disclosure. The impact is limited to local access, meaning the attacker must already have some level of access to the system.

Compliance Impact

This vulnerability could lead to unauthorized data exposure, which may violate compliance requirements under GDPR, HIPAA, or other regulations that mandate protection of sensitive information. Organizations must address this to maintain compliance.

Mitigation Strategies

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

Chat Assistant

Ask questions about this CVE
Hi! I’m here to help you understand CVE-2026-64899. Ask me anything about the vulnerability, its impact, or mitigation strategies.
0/70

EPSS Chart