CVE-2026-88122: 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 10.0.26100.33650Patch KB5126646 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.20348.5761Patch KB5126655 - Upgrade
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Fixed in 10.0.17763.9376Patch KB5126651 - 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 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
Event History
Frequently Asked Questions
Which systems are exposed to this issue?
The affected products listed are Microsoft Windows Server 2012, 2012 R2, 2016, 2019, 2022, and 2025 when they are operating in the DNS Server role.
What access does an attacker need to exploit it?
An attacker must be authorized and can exploit the issue over a network. User interaction is not required, and the attack complexity is rated low.
What is the expected impact?
Successful exploitation can deny service on the DNS Server. The provided vector indicates no confidentiality or integrity impact.