Medium5.3Microsoft Server

Medium [CVE-2021-33744] Windows Secure Kernel Mode Security Feature Bypass Vulnerability

This medium-severity Microsoft Server advisory covers CVE-2021-33744 affecting Windows Server 2019 (Server Core installation), Windows Server version 2004, Windows Server version 20H2.

CVE-2021-33744 Published Jul 14, 2021Updated by vendor Aug 10, 2026

CVE-2021-33744

Affected products & platforms

Microsoft ServerWindows Server

Open vendor advisory

Android app · Google Play

Monitor future Microsoft Server CVEs from your phone.

Choose a whole vendor or a precise platform, then receive matching security advisories by phone notification, email, or both. Coverage follows 32 official vendor sources and 160+ reviewed platform categories.

Matching phone alertsOptional email delivery

Get CVE alerts See app features

Summary

Windows Secure Kernel Mode Security Feature Bypass Vulnerability

Affected products named by the advisory: Windows Server 2019; Windows Server 2019 (Server Core installation); Windows Server version 2004; Windows Server version 20H2.

Affected versions

Windows 10 Version 1809 10.0.17763.0 before 10.0.17763.2061
Windows 10 Version 1909 10.0.0 before 10.0.18363.1679
Windows 10 Version 2004 10.0.0 before 10.0.19041.1110
Windows 10 Version 21H1 10.0.0 before 10.0.19043.1110
Windows Server 2019 10.0.17763.0 before 10.0.17763.2061
Windows Server 2019 (Server Core installation) 10.0.17763.0 before 10.0.17763.2061
Windows Server version 2004 10.0.0 before 10.0.19041.1110
Windows Server version 20H2 10.0.0 before 10.0.19042.1110

Official advisory · high-confidence parse· fetched 2 hours ago·verify at source

Fixed versions

10.0.17763.2061
10.0.18363.1679
10.0.19041.1110
10.0.19043.1110
10.0.19042.1110

Official advisory · high-confidence parse· fetched 2 hours ago·verify at source

Mitigation

Upgrade to a fixed release: 10.0.17763.2061, 10.0.18363.1679, 10.0.19041.1110, 10.0.19043.1110, 10.0.19042.1110. 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 2 hours ago·verify at source

Discussion(0)

No comments yet. Share field notes, upgrade gotchas, or questions — verify against the vendor advisory before acting on community advice.