Microsoft Windows 11 25H2 vulnerabilities

CVE-2026-65773 [HIGH] CWE-284 CVE-2026-65773: Improper access control in Windows Kernel allows an authorized attacker to elevate privileges locall Improper access control in Windows Kernel allows an authorized attacker to elevate privileges locally.

CVE-2026-50343 [HIGH] CWE-269 CVE-2026-50343: Improper privilege management in Microsoft Install Service allows an authorized attacker to elevate Improper privilege management in Microsoft Install Service allows an authorized attacker to elevate privileges locally.

CVE-2026-50423 [HIGH] CWE-284 CVE-2026-50423: Improper access control in Windows Kernel allows an authorized attacker to elevate privileges locall Improper access control in Windows Kernel allows an authorized attacker to elevate privileges locally.

CVE-2026-40409 [HIGH] CWE-197 CVE-2026-40409: Windows Universal Disk Format File System Driver (UDFS) Elevation of Privilege Vulnerability Windows Universal Disk Format File System Driver (UDFS) Elevation of Privilege Vulnerability

CVE-2026-27907 [HIGH] CWE-191 CVE-2026-27907: Integer underflow (wrap or wraparound) in Windows Storage Spaces Controller allows an authorized att Integer underflow (wrap or wraparound) in Windows Storage Spaces Controller allows an authorized attacker to elevate privileges locally.

CVE-2026-45592 [HIGH] CWE-190 CVE-2026-45592: Integer overflow or wraparound in Windows Internet (wininet.dll) allows an authorized attacker to el Integer overflow or wraparound in Windows Internet (wininet.dll) allows an authorized attacker to elevate privileges locally.

CVE-2026-26153 [HIGH] CWE-125 CVE-2026-26153: Out-of-bounds read in Windows Encrypting File System (EFS) allows an authorized attacker to elevate Out-of-bounds read in Windows Encrypting File System (EFS) allows an authorized attacker to elevate privileges locally.

CVE-2026-42896 [HIGH] CWE-122 CVE-2026-42896: Integer overflow or wraparound in Windows DWM Core Library allows an authorized attacker to elevate Integer overflow or wraparound in Windows DWM Core Library allows an authorized attacker to elevate privileges locally.

CVE-2026-50491 [HIGH] CWE-125 CVE-2026-50491: Out-of-bounds read in Code Integrity DLL (ci.dll) allows an authorized attacker to elevate privilege Out-of-bounds read in Code Integrity DLL (ci.dll) allows an authorized attacker to elevate privileges locally.

CVE-2026-33834 [HIGH] CWE-284 CVE-2026-33834: Improper access control in Windows Event Logging Service allows an authorized attacker to elevate pr Improper access control in Windows Event Logging Service allows an authorized attacker to elevate privileges locally.

CVE-2026-69650 [HIGH] CWE-347 CVE-2026-69650: Improper verification of cryptographic signature in Windows Key Distribution Center allows an author Improper verification of cryptographic signature in Windows Key Distribution Center allows an authorized attacker to elevate privileges locally.

CVE-2026-61349 [HIGH] CWE-362 CVE-2026-61349: Use after free in Windows Work Folder Service allows an authorized attacker to elevate privileges lo Use after free in Windows Work Folder Service allows an authorized attacker to elevate privileges locally.

CVE-2026-20852 [HIGH] CWE-266 CVE-2026-20852: Incorrect privilege assignment in Windows Hello allows an unauthorized attacker to perform tampering Incorrect privilege assignment in Windows Hello allows an unauthorized attacker to perform tampering locally.

CVE-2026-20804 [HIGH] CWE-266 CVE-2026-20804: Incorrect privilege assignment in Windows Hello allows an unauthorized attacker to perform tampering Incorrect privilege assignment in Windows Hello allows an unauthorized attacker to perform tampering locally.

CVE-2026-34338 [HIGH] CWE-416 CVE-2026-34338: Use after free in Windows Telephony Service allows an authorized attacker to elevate privileges loca Use after free in Windows Telephony Service allows an authorized attacker to elevate privileges locally.

CVE-2026-40382 [HIGH] CWE-416 CVE-2026-40382: Use after free in Windows Telephony Service allows an authorized attacker to elevate privileges loca Use after free in Windows Telephony Service allows an authorized attacker to elevate privileges locally.

CVE-2026-85933 [HIGH] CWE-416 CVE-2026-85933: Use after free in Windows Print Spooler Components allows an authorized attacker to elevate privileg Use after free in Windows Print Spooler Components allows an authorized attacker to elevate privileges locally.

CVE-2026-27920 [HIGH] CWE-822 CVE-2026-27920: Untrusted pointer dereference in Windows Universal Plug and Play (UPnP) Device Host allows an author Untrusted pointer dereference in Windows Universal Plug and Play (UPnP) Device Host allows an authorized attacker to elevate privileges locally.

CVE-2026-72929 [HIGH] CWE-354 CVE-2026-72929: Improper validation of integrity check value in Windows Installer allows an authorized attacker to e Improper validation of integrity check value in Windows Installer allows an authorized attacker to elevate privileges locally.

CVE-2026-26170 [HIGH] CWE-20 CVE-2026-26170: Improper input validation in Microsoft PowerShell allows an authorized attacker to elevate privilege Improper input validation in Microsoft PowerShell allows an authorized attacker to elevate privileges locally.