Microsoft Windows 11 26H1 vulnerabilities

CVE-2026-50486 [HIGH] CWE-416 CVE-2026-50486: Use after free in Windows Runtime allows an authorized attacker to elevate privileges locally. Use after free in Windows Runtime allows an authorized attacker to elevate privileges locally.

CVE-2026-50466 [HIGH] CWE-416 CVE-2026-50466: Use after free in Windows Brokering File System allows an authorized attacker to elevate privileges Use after free in Windows Brokering File System allows an authorized attacker to elevate privileges locally.

CVE-2026-49166 [HIGH] CWE-416 CVE-2026-49166: Use after free in Microsoft Printer Drivers allows an authorized attacker to elevate privileges loca Use after free in Microsoft Printer Drivers allows an authorized attacker to elevate privileges locally.

CVE-2026-58537 [HIGH] CWE-416 CVE-2026-58537: Use after free in Microsoft NAT Helper Components (ipnathlp.dll) allows an authorized attacker to el Use after free in Microsoft NAT Helper Components (ipnathlp.dll) allows an authorized attacker to elevate privileges locally.

CVE-2026-58634 [HIGH] CWE-416 CVE-2026-58634: 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-2026-58541 [HIGH] CWE-843 CVE-2026-58541: Access of resource using incompatible type ('type confusion') in Windows DWM allows an authorized at Access of resource using incompatible type ('type confusion') in Windows DWM allows an authorized attacker to elevate privileges locally.

CVE-2026-50493 [HIGH] CWE-416 CVE-2026-50493: Use after free in Windows Graphics Kernel allows an authorized attacker to elevate privileges locall Use after free in Windows Graphics Kernel allows an authorized attacker to elevate privileges locally.

CVE-2026-50413 [HIGH] CWE-416 CVE-2026-50413: Use after free in Windows Runtime allows an authorized attacker to elevate privileges locally. Use after free in Windows Runtime allows an authorized attacker to elevate privileges locally.

CVE-2026-50433 [HIGH] CWE-416 CVE-2026-50433: 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.

CVE-2026-42916 [HIGH] CWE-190 CVE-2026-42916: Integer overflow or wraparound in Windows NT OS Kernel allows an authorized attacker to elevate priv Integer overflow or wraparound in Windows NT OS Kernel allows an authorized attacker to elevate privileges locally.

CVE-2026-83756 [HIGH] CWE-416 CVE-2026-83756: Use after free in Windows Win32 Kernel Subsystem allows an authorized attacker to elevate privileges Use after free in Windows Win32 Kernel Subsystem allows an authorized attacker to elevate privileges locally.

CVE-2026-88074 [HIGH] CWE-190 CVE-2026-88074: Integer overflow or wraparound in Windows Virtualization-Based Security (VBS) Enclave allows an auth Integer overflow or wraparound in Windows Virtualization-Based Security (VBS) Enclave allows an authorized attacker to elevate privileges locally.

CVE-2026-41088 [HIGH] CWE-73 CVE-2026-41088: Access of resource using incompatible type ('type confusion') in Windows Ancillary Function Driver f Access of resource using incompatible type ('type confusion') in Windows Ancillary Function Driver for WinSock allows an authorized attacker to elevate privileges locally.

CVE-2026-34344 [HIGH] CWE-843 CVE-2026-34344: Access of resource using incompatible type ('type confusion') in Windows Ancillary Function Driver f Access of resource using incompatible type ('type confusion') in Windows Ancillary Function Driver for WinSock allows an authorized attacker to elevate privileges locally.

CVE-2026-85795 [HIGH] CWE-416 CVE-2026-85795: Use after free in Windows Text Services Framework allows an authorized attacker to elevate privilege Use after free in Windows Text Services Framework allows an authorized attacker to elevate privileges locally.

CVE-2026-88100 [HIGH] CWE-416 CVE-2026-88100: Use after free in Windows Storage Spaces Controller allows an authorized attacker to elevate privile Use after free in Windows Storage Spaces Controller allows an authorized attacker to elevate privileges locally.

CVE-2026-85375 [HIGH] CWE-416 CVE-2026-85375: 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-2026-85820 [HIGH] CWE-122 CVE-2026-85820: Use after free in Windows Universal Disk Format File System Driver (UDFS) allows an authorized attac Use after free in Windows Universal Disk Format File System Driver (UDFS) allows an authorized attacker to elevate privileges locally.

CVE-2026-96244 [HIGH] CWE-416 CVE-2026-96244: Use after free in Windows Internal System User Profile allows an authorized attacker to elevate priv Use after free in Windows Internal System User Profile allows an authorized attacker to elevate privileges locally.

CVE-2026-84016 [HIGH] CWE-787 CVE-2026-84016: Out-of-bounds write in Windows EAPHost Service allows an authorized attacker to elevate privileges l Out-of-bounds write in Windows EAPHost Service allows an authorized attacker to elevate privileges locally.