Microsoft Windows 11 26H1 vulnerabilities

CVE-2026-50348 [HIGH] CWE-362 CVE-2026-50348: Concurrent execution using shared resource with improper synchronization ('race condition') in Windo Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Runtime allows an unauthorized attacker to elevate privileges over a network.

CVE-2026-50452 [HIGH] CWE-362 CVE-2026-50452: Concurrent execution using shared resource with improper synchronization ('race condition') in Windo Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Runtime allows an unauthorized attacker to elevate privileges over a network.

CVE-2026-58608 [HIGH] CWE-362 CVE-2026-58608: Concurrent execution using shared resource with improper synchronization ('race condition') in Windo Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Print Spooler Components allows an authorized attacker to execute code over a network.

CVE-2026-32162 [HIGH] CWE-349 CVE-2026-32162: Acceptance of extraneous untrusted data with trusted data in Windows COM allows an unauthorized atta Acceptance of extraneous untrusted data with trusted data in Windows COM allows an unauthorized 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-2026-50509 [HIGH] CWE-502 CVE-2026-50509: Deserialization of untrusted data in Windows Wireless Wide Area Network Service allows an authorized Deserialization of untrusted data in Windows Wireless Wide Area Network Service allows an authorized attacker to elevate privileges locally.

CVE-2026-50382 [HIGH] CWE-822 CVE-2026-50382: Untrusted pointer dereference in Windows DirectX allows an authorized attacker to execute code local Untrusted pointer dereference in Windows DirectX allows an authorized attacker to execute code locally.

CVE-2026-27914 [HIGH] CWE-284 CVE-2026-27914: Improper access control in Microsoft Management Console allows an authorized attacker to elevate pri Improper access control in Microsoft Management Console allows an authorized attacker to elevate privileges locally.

CVE-2026-26132 [HIGH] CWE-416 CVE-2026-26132: Use after free in Windows Kernel allows an authorized attacker to elevate privileges locally. Use after free in Windows Kernel allows an authorized attacker to elevate privileges locally.

CVE-2026-33840 [HIGH] CWE-416 CVE-2026-33840: 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-2026-50329 [HIGH] CWE-416 CVE-2026-50329: Use after free in Windows Kernel allows an authorized attacker to elevate privileges locally. Use after free in Windows Kernel allows an authorized attacker to elevate privileges locally.

CVE-2026-54114 [HIGH] CWE-416 CVE-2026-54114: Use after free in Windows Win32K allows an authorized attacker to elevate privileges locally. Use after free in Windows Win32K 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-2026-56189 [HIGH] CWE-122 CVE-2026-56189: Heap-based buffer overflow in Microsoft Windows Media Foundation allows an unauthorized attacker to Heap-based buffer overflow in Microsoft Windows Media Foundation allows an unauthorized attacker to execute code locally.

CVE-2026-54122 [HIGH] CWE-122 CVE-2026-54122: Heap-based buffer overflow in Windows GDI+ allows an unauthorized attacker to execute code locally. Heap-based buffer overflow in Windows GDI+ allows an unauthorized attacker to execute code locally.

CVE-2026-50436 [HIGH] CWE-416 CVE-2026-50436: Use after free in Windows Kernel allows an authorized attacker to elevate privileges locally. Use after free in Windows Kernel allows an authorized attacker to elevate privileges locally.

CVE-2026-50688 [HIGH] CWE-416 CVE-2026-50688: Use after free in Windows Kernel allows an authorized attacker to elevate privileges locally. Use after free in Windows Kernel allows an authorized attacker to elevate privileges locally.

CVE-2026-42981 [HIGH] CWE-191 CVE-2026-42981: Integer underflow (wrap or wraparound) in Windows Performance Monitor allows an unauthorized attacke Integer underflow (wrap or wraparound) in Windows Performance Monitor allows an unauthorized attacker to execute code over a network.

CVE-2026-42974 [HIGH] CWE-190 CVE-2026-42974: Integer overflow or wraparound in Windows Performance Monitor allows an unauthorized attacker to exe Integer overflow or wraparound in Windows Performance Monitor allows an unauthorized attacker to execute code over a network.

CVE-2026-25173 [HIGH] CWE-122 CVE-2026-25173: Integer overflow or wraparound in Windows Routing and Remote Access Service (RRAS) allows an authori Integer overflow or wraparound in Windows Routing and Remote Access Service (RRAS) allows an authorized attacker to execute code over a network.