CVE-2026-105718

Analyzed Analyzed - Analysis Complete

Out-of-Bounds Read in Microsoft Office Excel

Publication date: 2026-10-13

Last updated on: 2026-10-15

Assigner: Microsoft Corporation

Description

Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.

CVSS Scores

EPSS Scores

Probability:
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Meta Information

Published

2026-10-13

Last Modified

2026-10-15

Generated

2026-10-19

AI Q&A

2026-10-14

EPSS Evaluated

2026-10-18

NVD

CVE-2026-105718

EUVD

EUVD-2026-99072

Affected Vendors & Products

Vendor	Product	Version / Range
microsoft	365_apps	*
microsoft	365_apps	*
microsoft	microsoft_365	*
microsoft	office_2021	*
microsoft	office_2021	*
microsoft	office_2021	*
microsoft	office_2024	*
microsoft	office_2024	*
microsoft	office_2024	*
microsoft	office_online_server	to 16.0.10417.20228 (exc)

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.
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 Excel. It allows an unauthorized attacker to execute arbitrary code remotely over a network by exploiting memory access beyond allocated bounds.

Impact Analysis

An attacker could exploit this to run malicious code on your system, potentially stealing data, installing malware, or taking control of your computer. This requires user interaction like opening a specially crafted Excel file.

Compliance Impact

This vulnerability allows remote code execution via an out-of-bounds read in Microsoft Office Excel, which could lead to unauthorized access or data exfiltration. Such breaches may violate compliance requirements under GDPR (data protection) and HIPAA (health data security) if sensitive information is exposed.

Mitigation Strategies

Apply the latest security updates from Microsoft for Office Excel as soon as possible to patch the out-of-bounds read vulnerability.

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