CVE-2026-88129: Role: DNS Server Denial of Service Vulnerability
Out-of-bounds read in DNS Server allows an authorized attacker to deny service over a network.
Other sources
Role: DNS Server Denial of Service 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 10.0.17763.9376Patch KB5126651 - 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 6.2.9200.26434Patch KB5126835 - 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 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
Event History
Frequently Asked Questions
Which systems should be prioritized for review?
Systems running the DNS Server role on Microsoft Windows Server 2012, 2012 R2, 2016, 2019, 2022, or 2025 should be reviewed.
What access does an attacker need?
The attacker must be authorized and have low privileges. Exploitation is network-based and does not require user interaction.
Is data confidentiality or integrity affected?
The available scoring indicates no confidentiality or integrity impact. The impact is limited to high availability impact through denial of service.