Microsoft Windows 11 25H2 vulnerabilities

CVE-2026-49788 [HIGH] CWE-770 CVE-2026-49788: Allocation of resources without limits or throttling in HTTP/2 allows an unauthorized attacker to de Allocation of resources without limits or throttling in HTTP/2 allows an unauthorized attacker to deny service over a network.

CVE-2026-44806 [HIGH] CWE-401 CVE-2026-44806: Missing release of memory after effective lifetime in Windows Cryptographic Services allows an unaut Missing release of memory after effective lifetime in Windows Cryptographic Services allows an unauthorized attacker to deny service over a network.

CVE-2026-83761 [HIGH] CWE-416 CVE-2026-83761: 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-2026-70303 [HIGH] CWE-787 CVE-2026-70303: Out-of-bounds write in Windows Kernel allows an authorized attacker to elevate privileges locally. Out-of-bounds write in Windows Kernel allows an authorized attacker to elevate privileges locally.

CVE-2026-45636 [HIGH] CWE-20 CVE-2026-45636: Heap-based buffer overflow in Windows NTFS allows an unauthorized attacker to execute code locally. Heap-based buffer overflow in Windows NTFS allows an unauthorized attacker to execute code locally.

CVE-2026-26156 [HIGH] CWE-20 CVE-2026-26156: Heap-based buffer overflow in Windows Hyper-V allows an unauthorized attacker to execute code locall Heap-based buffer overflow in Windows Hyper-V allows an unauthorized attacker to execute code locally.

CVE-2026-69926 [HIGH] CWE-843 CVE-2026-69926: Access of resource using incompatible type ('type confusion') in Desktop Window Manager allows an au Access of resource using incompatible type ('type confusion') in Desktop Window Manager allows an authorized attacker to elevate privileges locally.

CVE-2026-69880 [HIGH] CWE-843 CVE-2026-69880: Access of resource using incompatible type ('type confusion') in Desktop Window Manager allows an au Access of resource using incompatible type ('type confusion') in Desktop Window Manager allows an authorized attacker to elevate privileges locally.

CVE-2025-59242 [HIGH] CWE-122 CVE-2025-59242: Heap-based buffer overflow in Windows Ancillary Function Driver for WinSock allows an authorized att Heap-based buffer overflow in Windows Ancillary Function Driver for WinSock allows an authorized attacker to elevate privileges locally.

CVE-2026-70222 [HIGH] CWE-23 CVE-2026-70222: Relative path traversal in Windows Shell allows an authorized attacker to elevate privileges locally Relative path traversal in Windows Shell allows an authorized attacker to elevate privileges locally.

CVE-2026-83873 [HIGH] CWE-23 CVE-2026-83873: Relative path traversal in Windows Shell allows an authorized attacker to elevate privileges locally Relative path traversal in Windows Shell allows an authorized attacker to elevate privileges locally.

CVE-2026-70225 [HIGH] CWE-843 CVE-2026-70225: 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-2026-83927 [HIGH] CWE-59 CVE-2026-83927: Improper link resolution before file access ('link following') in Windows Registry allows an authori Improper link resolution before file access ('link following') in Windows Registry allows an authorized attacker to elevate privileges locally.

CVE-2026-32154 [HIGH] CWE-416 CVE-2026-32154: 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-2026-70102 [HIGH] CWE-416 CVE-2026-70102: Use after free in Windows Spaceport.sys allows an authorized attacker to elevate privileges locally. Use after free in Windows Spaceport.sys allows an authorized attacker to elevate privileges locally.

CVE-2026-61931 [HIGH] CWE-416 CVE-2026-61931: Use after free in Windows Perception Simulation Service allows an authorized attacker to elevate pri Use after free in Windows Perception Simulation Service allows an authorized attacker to elevate privileges locally.

CVE-2026-69798 [HIGH] CWE-416 CVE-2026-69798: Use after free in Windows Wired AutoConfig Service allows an authorized attacker to elevate privileg Use after free in Windows Wired AutoConfig Service allows an authorized attacker to elevate privileges locally.

CVE-2026-69884 [HIGH] CWE-126 CVE-2026-69884: Buffer over-read in Windows GDI allows an authorized attacker to elevate privileges locally. Buffer over-read in Windows GDI allows an authorized attacker to elevate privileges locally.

CVE-2025-64680 [HIGH] CWE-122 CVE-2025-64680: Heap-based buffer overflow in Windows DWM Core Library allows an authorized attacker to elevate priv Heap-based buffer overflow in Windows DWM Core Library allows an authorized attacker to elevate privileges locally.

CVE-2026-70052 [HIGH] CWE-122 CVE-2026-70052: Integer overflow or wraparound in Windows PowerShell allows an authorized attacker to execute code l Integer overflow or wraparound in Windows PowerShell allows an authorized attacker to execute code locally.