Microsoft Windows 11 21H2 vulnerabilities, page 5
997 vulnerabilities
Known vulnerabilities in Microsoft Windows 11 21H2, newest first, with CVSS severity, EPSS, KEV listings, ransomware use and the affected versions.
CVE-2024-21366microsoftwindows_10_1507+33
EPSS score1.77%
Microsoft WDAC OLE DB provider for SQL Server Remote Code Execution VulnerabilityCVE-2024-21311microsoftwindows_10_1507+33EPSS score0.78%
Windows Cryptographic Services Information Disclosure VulnerabilityCVE-2024-21367microsoftwindows_10_1507+33EPSS score1.64%
Microsoft WDAC OLE DB provider for SQL Server Remote Code Execution VulnerabilityCVE-2024-21375microsoftwindows_10_1507+33EPSS score1.65%
Microsoft WDAC OLE DB provider for SQL Server Remote Code Execution VulnerabilityCVE-2024-21338microsoftwindows_10_1809+17KEVRansomwareEPSS score59.81%
Windows Kernel Elevation of Privilege VulnerabilityCVE-2024-21446microsoftwindows_10_1507+33EPSS score0.66%
NTFS Elevation of Privilege VulnerabilityCVE-2024-21438microsoftwindows_10_1507+25EPSS score2.72%
Microsoft AllJoyn API Denial of Service VulnerabilityCVE-2024-21447microsoftwindows_10_21h2+13EPSS score1.38%
Windows Authentication Elevation of Privilege VulnerabilityCVE-2024-21343microsoftwindows_10_1507+26EPSS score1.84%
Windows Network Address Translation (NAT) Denial of Service VulnerabilityCVE-2024-21430microsoftwindows_10_1507+27EPSS score0.70%
Windows USB Attached SCSI (UAS) Protocol Remote Code Execution VulnerabilityCVE-2024-21349microsoftwindows_10_1507+33EPSS score1.64%
Microsoft ActiveX Data Objects Remote Code Execution VulnerabilityCVE-2024-21405microsoftwindows_10_1507+33EPSS score0.38%
Microsoft Message Queuing (MSMQ) Elevation of Privilege VulnerabilityCVE-2024-21302microsoftwindows_10_1507+25EPSS score1.57%
Summary:
As of July 8, 2025 Microsoft has completed mitigations to address this vulnerability. See KB5042562: Guidance for blocking rollback of virtualization-based security related updates and the Recommended Actions section of this CVE for guidance on how to protect your systems from this vulnerability.
An elevation of privilege vulnerability exists in Windows based systems supporting Virtualization Based Security (VBS), including a subset of Azure Virtual Machine SKUS. This vulnerability enables an attacker with administrator privileges to replace current versions of Windows system files with outdated versions. By exploiting this vulnerability, an attacker could reintroduce previously mitigated vulnerabilities, circumvent some features of VBS, and exfiltrate data protected by VBS.
Update: July 10, 2025
Microsoft has addressed this vulnerability for Windows 10 1507, Windows 10, version 1607, Windows 10, version 1809, and Windows Server 2016 and Windows Server 2018. This ensures that mitigations are available to protect all supported versions of Windows 10 and Windows 11 from this vulnerability. See the available mitigations and deployment guidelines described in KB5042562: Guidance for blocking rollback of virtualization-based security related updates.
Update: August 13, 2024
Microsoft has released the August 2024 security updates that include an opt-in revocation policy mitigation to address this vulnerability. Customers running affected versions of Windows are encouraged to review KB5042562: Guidance for blocking rollback of virtualization-based security related updates to assess if this opt-in policy meets the needs of their environment before implementing this mitigation. There are risks associated with this mitigation that should be understood prior to applying it to your systems. Detailed information about these risks is also available in KB5042562.
Details:
A security researcher informed Microsoft of an elevation of privilege vulnerability in Windows 10, Windows 11, Windows Server 2016, and higher based systems including Azure Virtual Machines (VM) that support VBS. For more information on Windows versions and VM SKUs supporting VBS, reference: Virtualization-based Security (VBS) | Microsoft Learn.
The vulnerability enables an attacker with administrator privileges on the target system to replace current Windows system files with outdated versions. Successful... See more at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2024-21302CVE-2024-21371microsoftwindows_10_1507+27EPSS score10.88%
Windows Kernel Elevation of Privilege VulnerabilityCVE-2024-21320microsoftwindows_10_1507+25EPSS score22.60%
Windows Themes Spoofing VulnerabilityCVE-2024-21350microsoftwindows_10_1507+33EPSS score1.48%
Microsoft WDAC OLE DB provider for SQL Server Remote Code Execution VulnerabilityCVE-2024-21443microsoftwindows_10_1809+17EPSS score1.29%
Windows Kernel Elevation of Privilege VulnerabilityCVE-2024-21451microsoftwindows_10_1507+33EPSS score1.95%
Microsoft ODBC Driver Remote Code Execution VulnerabilityCVE-2024-21355microsoftwindows_10_1507+32EPSS score0.32%
Microsoft Message Queuing (MSMQ) Elevation of Privilege VulnerabilityCVE-2024-21304microsoftwindows_10_1809+16EPSS score0.48%
Trusted Compute Base Elevation of Privilege Vulnerability