CVE-2026-68831

Analyzed Analyzed - Analysis Complete

Information Disclosure in Windows Defender Firewall Service

Publication date: 2026-09-08

Last updated on: 2026-09-24

Assigner: Microsoft Corporation

Description

Files or directories accessible to external parties in Windows Defender Firewall Service allows an authorized attacker to disclose information locally.

CVSS Scores

EPSS Scores

Probability:
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Meta Information

Published

2026-09-08

Last Modified

2026-09-24

Generated

2026-09-29

AI Q&A

2026-09-10

EPSS Evaluated

2026-09-27

NVD

CVE-2026-68831

Affected Vendors & Products

Vendor	Product	Version / Range
microsoft	windows_defender_firewall_service	*

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-552	The product makes files or directories accessible to unauthorized actors, even though they should not be.

Attack-Flow Graph

Executive Summary

This vulnerability involves files or directories in Windows Defender Firewall Service that are accessible to external parties. An authorized attacker can exploit this to disclose information locally on the affected system.

Impact Analysis

An attacker with local access could exploit this to read sensitive files or directories, potentially exposing confidential data. The impact is limited to local disclosure as the attacker must already have authorization.

Compliance Impact

This vulnerability could lead to unauthorized access to sensitive data, which may violate compliance requirements such as GDPR or HIPAA. Organizations must address it to maintain data protection standards.

Mitigation Strategies

Ensure Windows Defender Firewall Service is updated to the latest version. Review firewall rules to restrict unauthorized access to sensitive files or directories. Monitor system logs for unusual activity related to the firewall service.

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