CVE-2026-63521
Received Received - Intake

Out-of-Bounds Read in Microsoft Office Word

Publication date: 2026-08-11

Last updated on: 2026-08-11

Assigner: Microsoft Corporation

Description
Out-of-bounds read in Microsoft Office Word 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
CVE-2026-63521
EUVD
EUVD-2026-56423

Affected Vendors & Products

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

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 vulnerability is an out-of-bounds read issue in Microsoft Office Word. 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 personal information, potentially leading to privacy breaches or further attacks.

Compliance Impact

This vulnerability could lead to unauthorized data disclosure, which may violate compliance requirements under GDPR or HIPAA if sensitive personal or health information is exposed.

Mitigation Strategies

Apply the latest security updates from Microsoft for Office Word to patch the out-of-bounds read vulnerability.

Chat Assistant

Ask questions about this CVE
Hi! I’m here to help you understand CVE-2026-63521. Ask me anything about the vulnerability, its impact, or mitigation strategies.
0/70

EPSS Chart