CVE-2026-70071: Role: DNS Server Tampering Vulnerability
Improper verification of cryptographic signature in DNS Server allows an authorized attacker to perform tampering locally.
Other sources
Role: DNS Server Tampering Vulnerability
— Microsoft
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.26100.33650Patch KB5126646 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 6.2.9200.26434Patch KB5126835 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 6.3.9600.23470Patch KB5126836 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.14393.9612Patch KB5126868 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.20348.5761Patch KB5126655 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.17763.9376Patch KB5126651
Event History
Frequently Asked Questions
Which systems are exposed to this issue?
The affected software list includes Microsoft Windows 10 and Windows Server 2012, 2012 R2, 2016, 2019, 2022, and 2025. The issue is associated with the DNS Server role, so exposure is relevant where that role is deployed.
What access does an attacker need?
An attacker must already be authorized and have local access. The supplied vector indicates low attack complexity, no user interaction requirement, and low privileges required.
What is the expected security impact?
The stated impact is integrity loss: an attacker can tamper with DNS Server-related data or behavior. No confidentiality or availability impact is indicated in the provided vector.