Microsoft Windows 10 21H2 vulnerabilities

CVE-2026-83942 [HIGH] CWE-862 CVE-2026-83942: Missing authorization in Windows Kernel allows an authorized attacker to elevate privileges locally. Missing authorization in Windows Kernel allows an authorized attacker to elevate privileges locally.

CVE-2026-61925 [HIGH] CWE-863 CVE-2026-61925: Incorrect authorization in Windows Installer allows an authorized attacker to elevate privileges loc Incorrect authorization in Windows Installer allows an authorized attacker to elevate privileges locally.

CVE-2026-62721 [HIGH] CWE-1220 CVE-2026-62721: Insufficient granularity of access control in User-Mode Power Service (UMPS) allows an authorized at Insufficient granularity of access control in User-Mode Power Service (UMPS) allows an authorized attacker to elevate privileges locally.

CVE-2026-50344 [HIGH] CWE-285 CVE-2026-50344: Improper authorization in Windows OLE allows an authorized attacker to elevate privileges locally. Improper authorization in Windows OLE allows an authorized attacker to elevate privileges locally.

CVE-2026-50311 [HIGH] CWE-284 CVE-2026-50311: Improper access control in Windows Server allows an authorized attacker to elevate privileges locall Improper access control in Windows Server allows an authorized attacker to elevate privileges locally.

CVE-2026-58540 [HIGH] CWE-285 CVE-2026-58540: Improper authorization in Windows Installer allows an authorized attacker to elevate privileges loca Improper authorization in Windows Installer allows an authorized attacker to elevate privileges locally.

CVE-2026-50405 [HIGH] CWE-1220 CVE-2026-50405: Insufficient granularity of access control in Windows Filtering Platform (WFP) allows an authorized Insufficient granularity of access control in Windows Filtering Platform (WFP) allows an authorized attacker to elevate privileges locally.

CVE-2026-40408 [HIGH] CWE-416 CVE-2026-40408: Use after free in Windows Kernel-Mode Drivers allows an authorized attacker to elevate privileges lo Use after free in Windows Kernel-Mode Drivers allows an authorized attacker to elevate privileges locally.

CVE-2026-27915 [HIGH] CWE-416 CVE-2026-27915: Use after free in Windows Universal Plug and Play (UPnP) Device Host allows an authorized attacker t Use after free in Windows Universal Plug and Play (UPnP) Device Host allows an authorized attacker to elevate privileges locally.

CVE-2026-26162 [HIGH] CWE-843 CVE-2026-26162: Access of resource using incompatible type ('type confusion') in Windows OLE allows an authorized at Access of resource using incompatible type ('type confusion') in Windows OLE allows an authorized attacker to elevate privileges locally.

CVE-2026-26163 [HIGH] CWE-415 CVE-2026-26163: Double free in Windows Kernel allows an authorized attacker to elevate privileges locally. Double free in Windows Kernel allows an authorized attacker to elevate privileges locally.

CVE-2026-20861 [HIGH] CWE-362 CVE-2026-20861: Concurrent execution using shared resource with improper synchronization ('race condition') in Windo Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Management Services allows an authorized attacker to elevate privileges locally.

CVE-2026-20867 [HIGH] CWE-362 CVE-2026-20867: Concurrent execution using shared resource with improper synchronization ('race condition') in Windo Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Management Services allows an authorized attacker to elevate privileges locally.

CVE-2026-20866 [HIGH] CWE-362 CVE-2026-20866: Concurrent execution using shared resource with improper synchronization ('race condition') in Windo Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Management Services allows an authorized attacker to elevate privileges locally.

CVE-2026-20874 [HIGH] CWE-362 CVE-2026-20874: Concurrent execution using shared resource with improper synchronization ('race condition') in Windo Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Management Services allows an authorized attacker to elevate privileges locally.

CVE-2026-20873 [HIGH] CWE-362 CVE-2026-20873: Concurrent execution using shared resource with improper synchronization ('race condition') in Windo Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Management Services allows an authorized attacker to elevate privileges locally.

CVE-2026-27924 [HIGH] CWE-416 CVE-2026-27924: Use after free in Desktop Window Manager allows an authorized attacker to elevate privileges locally Use after free in Desktop Window Manager allows an authorized attacker to elevate privileges locally.

CVE-2024-38019 [HIGH] CWE-190 CVE-2024-38019: Microsoft Windows Performance Data Helper Library Remote Code Execution Vulnerability Microsoft Windows Performance Data Helper Library Remote Code Execution Vulnerability

CVE-2026-85376 [HIGH] CWE-1390 CVE-2026-85376: Weak authentication in Windows Print Spooler Components allows an authorized attacker to elevate pri Weak authentication in Windows Print Spooler Components allows an authorized attacker to elevate privileges locally.

CVE-2026-50358 [HIGH] CWE-416 CVE-2026-50358: Use after free in Windows Media allows an authorized attacker to elevate privileges locally. Use after free in Windows Media allows an authorized attacker to elevate privileges locally.