High7.5Microsoft Server

High [CVE-2026-33096] HTTP.sys Denial of Service Vulnerability

This high-severity Microsoft Server advisory covers CVE-2026-33096 affecting Windows Server 2022, 23H2 Edition (Server Core installation), Windows Server 2025 (Server Core installation).

CVE-2026-33096 Published Apr 14, 2026Updated by vendor Aug 14, 2026

CVE-2026-33096

Affected products & platforms

Microsoft ServerWindows Server

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Summary

Out-of-bounds read in Windows HTTP.sys allows an unauthorized attacker to deny service over a network.

Affected products named by the advisory: Windows Server 2022; Windows Server 2022, 23H2 Edition (Server Core installation); Windows Server 2025; Windows Server 2025 (Server Core installation).

Affected versions

Windows 11 version 22H3 10.0.22631.0 before 10.0.22631.6936
Windows 11 Version 23H2 10.0.22631.0 before 10.0.22631.6936
Windows 11 Version 24H2 10.0.26100.0 before 10.0.26100.8246
Windows 11 Version 25H2 10.0.26200.0 before 10.0.26200.8246
Windows 11 version 26H1 10.0.28000.0 before 10.0.28000.1836
Windows Server 2022 10.0.20348.0 before 10.0.20348.5020
Windows Server 2022, 23H2 Edition (Server Core installation) 10.0.25398.0 before 10.0.25398.2274
Windows Server 2025 10.0.26100.0 before 10.0.26100.32690
Windows Server 2025 (Server Core installation) 10.0.26100.0 before 10.0.26100.32690

Official advisory · high-confidence parse· fetched 3 hours ago·verify at source

Fixed versions

10.0.22631.6936
10.0.26100.8246
10.0.26200.8246
10.0.28000.1836
10.0.20348.5020
10.0.25398.2274
10.0.26100.32690

Official advisory · high-confidence parse· fetched 3 hours ago·verify at source

Mitigation

Upgrade to a fixed release: 10.0.22631.6936, 10.0.26100.8246, 10.0.26200.8246, 10.0.28000.1836, 10.0.20348.5020, 10.0.25398.2274. That is the remediation for this advisory.

The vendor advisory may list additional interim mitigations or workarounds not captured here — review it before change work.

Official advisory · high-confidence parse· fetched 3 hours ago·verify at source

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