CVE-2026-63525
Received Received - Intake

Numeric Truncation Error in Microsoft Office Word Leads to Code Execution

Publication date: 2026-08-11

Last updated on: 2026-08-11

Assigner: Microsoft Corporation

Description
Numeric truncation error in Microsoft Office Word allows an unauthorized attacker to execute code 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-2026-63525
EUVD
EUVD-2026-56691

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-197 Truncation errors occur when a primitive is cast to a primitive of a smaller size and data is lost in the conversion.

Attack-Flow Graph

AI Quick Actions

Instant insights powered by AI
Executive Summary

This vulnerability is a numeric truncation error in Microsoft Office Word that allows an unauthorized attacker to execute code locally on a victim's system.

Impact Analysis

An attacker could exploit this flaw to run malicious code on your computer, potentially leading to unauthorized access, data theft, or further system compromise if you open a specially crafted document.

Mitigation Strategies

Apply the latest security updates from Microsoft for Office Word as soon as possible to patch the numeric truncation error. Disable macros from untrusted sources and restrict user permissions to reduce attack surface.

Chat Assistant

Ask questions about this CVE
Hi! I’m here to help you understand CVE-2026-63525. Ask me anything about the vulnerability, its impact, or mitigation strategies.
0/70

EPSS Chart