CVE-2026-70083

Analyzed Analyzed - Analysis Complete

Incorrect Authorization in DNS Server Allows Local Tampering

Publication date: 2026-10-13

Last updated on: 2026-10-16

Assigner: Microsoft Corporation

Description

Incorrect 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-2026-70083

EUVD

EUVD-2026-99153

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_2016	to 10.0.14393.9612 (exc)
microsoft	windows_server_2019	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)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-863	The product performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check.

Attack-Flow Graph

Executive Summary

This vulnerability involves incorrect authorization in a DNS Server. An authorized attacker can perform tampering actions locally due to improper access controls.

Impact Analysis

An attacker could modify DNS records locally, potentially redirecting network traffic or disrupting services. This could lead to data interception or service unavailability.

Compliance Impact

This vulnerability allows unauthorized local tampering via incorrect authorization in DNS Server. Such tampering could compromise data integrity, potentially violating GDPR's requirement for accurate personal data processing and HIPAA's integrity standards for protected health information.

Mitigation Strategies

Apply the latest security updates from Microsoft to address the incorrect authorization issue in the DNS Server. Monitor Microsoft's update guide for patches specific to CVE-2026-70083.

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