Microsoft Windows 11 23H2 vulnerabilities

CVE-2025-49665 [HIGH] CWE-362 CVE-2025-49665: Concurrent execution using shared resource with improper synchronization ('race condition') in Works Concurrent execution using shared resource with improper synchronization ('race condition') in Workspace Broker allows an authorized attacker to elevate privileges locally.

CVE-2025-49733 [HIGH] CWE-416 CVE-2025-49733: Use after free in Windows Win32K - ICOMP allows an authorized attacker to elevate privileges locally Use after free in Windows Win32K - ICOMP allows an authorized attacker to elevate privileges locally.

CVE-2025-49725 [HIGH] CWE-416 CVE-2025-49725: Use after free in Windows Notification allows an authorized attacker to elevate privileges locally. Use after free in Windows Notification 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-2025-54913 [HIGH] CWE-362 CVE-2025-54913: Concurrent execution using shared resource with improper synchronization ('race condition') in Windo Concurrent execution using shared resource with improper synchronization ('race condition') in Windows UI XAML Maps MapControlSettings allows an authorized attacker to elevate privileges locally.

CVE-2025-58714 [HIGH] CWE-284 CVE-2025-58714: Improper access control in Windows Ancillary Function Driver for WinSock allows an authorized attack Improper access control in Windows Ancillary Function Driver for WinSock allows an authorized attacker to elevate privileges 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-2026-20804 [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-2026-27920 [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-2026-20852 [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-2026-26170 [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.

CVE-2026-27910 [HIGH] CWE-280 CVE-2026-27910: Improper handling of insufficient permissions or privileges in Windows Installer allows an authorize Improper handling of insufficient permissions or privileges in Windows Installer allows an authorized attacker to elevate privileges locally.

CVE-2026-32165 [HIGH] CWE-362 CVE-2026-32165: Use after free in Windows User Interface Core allows an authorized attacker to elevate privileges lo Use after free in Windows User Interface Core allows an authorized attacker to elevate privileges locally.

CVE-2026-32164 [HIGH] CWE-362 CVE-2026-32164: Concurrent execution using shared resource with improper synchronization ('race condition') in Windo Concurrent execution using shared resource with improper synchronization ('race condition') in Windows User Interface Core allows an authorized attacker to elevate privileges locally.

CVE-2026-32163 [HIGH] CWE-362 CVE-2026-32163: Concurrent execution using shared resource with improper synchronization ('race condition') in Windo Concurrent execution using shared resource with improper synchronization ('race condition') in Windows User Interface Core allows an authorized attacker to elevate privileges locally.

CVE-2026-26172 [HIGH] CWE-362 CVE-2026-26172: Concurrent execution using shared resource with improper synchronization ('race condition') in Windo Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Push Notifications allows an authorized attacker to elevate privileges locally.

CVE-2026-27911 [HIGH] CWE-362 CVE-2026-27911: Concurrent execution using shared resource with improper synchronization ('race condition') in Windo Concurrent execution using shared resource with improper synchronization ('race condition') in Windows User Interface Core allows an authorized attacker to elevate privileges locally.

CVE-2025-50161 [HIGH] CWE-122 CVE-2025-50161: Heap-based buffer overflow in Windows Win32K - GRFX allows an authorized attacker to elevate privile Heap-based buffer overflow in Windows Win32K - GRFX allows an authorized attacker to elevate privileges locally.

CVE-2026-20853 [HIGH] CWE-362 CVE-2026-20853: Concurrent execution using shared resource with improper synchronization ('race condition') in Windo Concurrent execution using shared resource with improper synchronization ('race condition') in Windows WalletService allows an unauthorized attacker to elevate privileges locally.