Microsoft Windows 11 25H2 vulnerabilities

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-2026-33101 [HIGH] CWE-416 CVE-2026-33101: 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-2026-27910 [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-2026-54989 [HIGH] CWE-416 CVE-2026-54989: Use after free in Quality Windows Audio/Video Experience (QWAVE) service allows an authorized attack Use after free in Quality Windows Audio/Video Experience (QWAVE) service 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-2026-49787 [HIGH] CWE-770 CVE-2026-49787: Allocation of resources without limits or throttling in Windows HTTP.sys allows an unauthorized atta Allocation of resources without limits or throttling in Windows HTTP.sys allows an unauthorized attacker to deny service over a network.

CVE-2026-54119 [HIGH] CWE-835 CVE-2026-54119: Loop with unreachable exit condition ('infinite loop') in Windows Active Directory allows an unautho Loop with unreachable exit condition ('infinite loop') in Windows Active Directory allows an unauthorized attacker to deny service over a network.

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.

CVE-2025-62565 [HIGH] CWE-416 CVE-2025-62565: Use after free in Windows Shell allows an authorized attacker to elevate privileges locally. Use after free in Windows Shell allows an authorized attacker to elevate privileges locally.

CVE-2026-50507 [MEDIUM] CWE-306 CVE-2026-50507: Missing authentication for critical function in Windows BitLocker allows an unauthorized attacker to Missing authentication for critical function in Windows BitLocker allows an unauthorized attacker to bypass a security feature with a physical attack.

CVE-2026-20875 [HIGH] CWE-476 CVE-2026-20875: Null pointer dereference in Windows Local Security Authority Subsystem Service (LSASS) allows an una Null pointer dereference in Windows Local Security Authority Subsystem Service (LSASS) allows an unauthorized attacker to deny service over a network.

CVE-2026-45654 [HIGH] CWE-284 CVE-2026-45654: Improper access control in Windows Secure Boot allows an authorized attacker to bypass a security fe Improper access control in Windows Secure Boot allows an authorized attacker to bypass a security feature locally.

CVE-2026-44812 [HIGH] CWE-190 CVE-2026-44812: Integer overflow or wraparound in Windows Win32K - GRFX allows an unauthorized attacker to execute c Integer overflow or wraparound in Windows Win32K - GRFX allows an unauthorized attacker to execute code locally.

CVE-2026-44803 [HIGH] CWE-190 CVE-2026-44803: Integer overflow or wraparound in Windows Win32K - GRFX allows an unauthorized attacker to execute c Integer overflow or wraparound in Windows Win32K - GRFX allows an unauthorized attacker to execute code locally.

CVE-2026-57095 [HIGH] CWE-200 CVE-2026-57095: Exposure of sensitive information to an unauthorized actor in Windows Win32K allows an unauthorized Exposure of sensitive information to an unauthorized actor in Windows Win32K allows an unauthorized attacker to elevate privileges locally.