CVE-2026-45459

Analyzed Analyzed - Analysis Complete

Microsoft Office Excel Security Feature Bypass

Publication date: 2026-06-09

Last updated on: 2026-06-19

Assigner: Microsoft Corporation

Description

Protection mechanism failure in Microsoft Office Excel allows an unauthorized attacker to bypass a security feature locally.

CVSS Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published

2026-06-09

Last Modified

2026-06-19

Generated

2026-06-30

AI Q&A

2026-06-10

EPSS Evaluated

2026-06-28

NVD

CVE-2026-45459

EUVD

EUVD-2026-35541

Affected Vendors & Products

Vendor	Product	Version / Range
microsoft	365_apps	*
microsoft	365_apps	*
microsoft	microsoft_365	*
microsoft	office_2021	*
microsoft	office_2024	*
microsoft	office_2024	*
microsoft	office_2024	*

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-693	The product does not use or incorrectly uses a protection mechanism that provides sufficient defense against directed attacks against the product.

Attack-Flow Graph

Mitigation Strategies

This vulnerability involves a protection mechanism failure in Microsoft Office Excel that allows an unauthorized attacker to bypass a security feature locally.

To mitigate this vulnerability, it is recommended to apply any security updates or patches provided by Microsoft as soon as they become available.

Executive Summary

This vulnerability is a protection mechanism failure in Microsoft Office Excel that allows an unauthorized attacker to bypass a security feature locally.

Impact Analysis

The impact of this vulnerability is that an unauthorized attacker can bypass a security feature on a local system, potentially reducing the effectiveness of security controls in Microsoft Office Excel.

Compliance Impact

The provided information does not specify how this vulnerability impacts compliance with common standards and regulations such as GDPR or HIPAA.

Hi! I’m here to help you understand CVE-2026-45459. Ask me anything about the vulnerability, its impact, or mitigation strategies.

0/70