CVE-2026-96926

Analyzed Analyzed - Analysis Complete

Missing Authorization in DNS Server Allows Local Tampering

Publication date: 2026-10-13

Last updated on: 2026-10-16

Assigner: Microsoft Corporation

Description

Missing authorization in DNS Server allows an authorized attacker to perform tampering locally.

CVSS Scores

EPSS Scores

Probability:
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Meta Information

Published

2026-10-13

Last Modified

2026-10-16

Generated

2026-10-19

AI Q&A

2026-10-14

EPSS Evaluated

2026-10-18

NVD

CVE-2026-96926

EUVD

EUVD-2026-100259

Affected Vendors & Products

Vendor	Product	Version / Range
microsoft	windows_server_2012	r2
microsoft	windows_server_2012	*
microsoft	windows_10_1607	to 10.0.14393.9612 (exc)
microsoft	windows_10_1607	to 10.0.14393.9612 (exc)
microsoft	windows_10_1809	to 10.0.17763.9376 (exc)
microsoft	windows_10_1809	to 10.0.17763.9376 (exc)
microsoft	windows_server_2025	to 10.0.26100.33650 (exc)
microsoft	windows_server_2022	to 10.0.20348.5761 (exc)
microsoft	windows_server_2016	to 10.0.14393.9612 (exc)
microsoft	windows_server_2019	to 10.0.17763.9376 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-862	The product does not perform an authorization check when an actor attempts to access a resource or perform an action.

Attack-Flow Graph

Executive Summary

This vulnerability involves a missing authorization check in the DNS Server component of affected Windows systems. An authorized attacker with local access can exploit this flaw to tamper with DNS data, potentially redirecting network traffic or altering system behavior.

Impact Analysis

An attacker could modify DNS responses to redirect users to malicious sites, intercept sensitive data, or disrupt network services. This could lead to phishing attacks, data theft, or service outages on systems running vulnerable Windows versions.

Compliance Impact

This vulnerability could violate compliance requirements by enabling unauthorized data access or modification. GDPR may require breach notification if personal data is exposed, while HIPAA could be violated if tampering affects protected health information integrity.

Mitigation Strategies

Apply the latest security updates from Microsoft to patch the DNS Server authorization flaw. Monitor Microsoft's update guide for patches and install them promptly.

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