CVE-2026-96248: Windows Host Guardian Service Denial of Service Vulnerability
Stack-based buffer overflow in Windows Host Guardian Service allows an unauthorized attacker to deny service over a network.
Other sources
Windows Host Guardian Service 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 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 10.0.26100.33650Patch KB5126646
Event History
Frequently Asked Questions
Does an attacker need credentials or user interaction to exploit this issue?
No. The vector indicates network exploitation with low attack complexity, no privileges required, and no user interaction required.
What is the expected security impact?
The reported impact is denial of service. Confidentiality and integrity impacts are listed as none, while availability impact is high.
Which Windows releases are listed as affected?
The listed software includes Microsoft Windows 10 and Microsoft Windows Server 2016, 2019, 2022, and 2025.