Microsoft Windows 11 Version 26H1 vulnerabilities

CVE-2026-62733 [HIGH] CWE-125 CVE-2026-62733: Out-of-bounds read in Windows Win32K allows an authorized attacker to elevate privileges locally. Out-of-bounds read in Windows Win32K allows an authorized attacker to elevate privileges locally.

CVE-2026-62880 [HIGH] CWE-125 CVE-2026-62880: Out-of-bounds read in Windows NTFS allows an authorized attacker to elevate privileges locally. Out-of-bounds read in Windows NTFS allows an authorized attacker to elevate privileges locally.

CVE-2026-62696 [HIGH] CWE-191 CVE-2026-62696: Integer underflow (wrap or wraparound) in Windows Program Compatibility Assistant Service allows an Integer underflow (wrap or wraparound) in Windows Program Compatibility Assistant Service allows an authorized attacker to elevate privileges locally.

CVE-2026-61357 [HIGH] CWE-416 CVE-2026-61357: Use after free in Application Information Services allows an authorized attacker to elevate privileg Use after free in Application Information Services allows an authorized attacker to elevate privileges locally.

CVE-2026-62741 [HIGH] CWE-122 CVE-2026-62741: Integer underflow (wrap or wraparound) in Windows HTTP.sys allows an authorized attacker to elevate Integer underflow (wrap or wraparound) in Windows HTTP.sys allows an authorized attacker to elevate privileges locally.

CVE-2026-50422 [HIGH] CWE-125 CVE-2026-50422: Out-of-bounds read in Windows NTFS allows an authorized attacker to elevate privileges locally. Out-of-bounds read in Windows NTFS allows an authorized attacker to elevate privileges locally.

CVE-2026-50315 [HIGH] CWE-476 CVE-2026-50315: Null pointer dereference in Windows Image Acquisition allows an authorized attacker to elevate privi Null pointer dereference in Windows Image Acquisition allows an authorized attacker to elevate privileges locally.

CVE-2026-49792 [HIGH] CWE-197 CVE-2026-49792: Numeric truncation error in Windows Resilient File System (ReFS) allows an authorized attacker to ex Numeric truncation error in Windows Resilient File System (ReFS) allows an authorized attacker to execute code locally.

CVE-2026-50357 [HIGH] CWE-197 CVE-2026-50357: Numeric truncation error in Windows Resilient File System (ReFS) allows an authorized attacker to ex Numeric truncation error in Windows Resilient File System (ReFS) allows an authorized attacker to execute code locally.

CVE-2026-58532 [HIGH] CWE-190 CVE-2026-58532: Integer overflow or wraparound in Windows Kernel allows an authorized attacker to elevate privileges Integer overflow or wraparound in Windows Kernel allows an authorized attacker to elevate privileges locally.

CVE-2026-56176 [HIGH] CWE-125 CVE-2026-56176: Out-of-bounds read in Windows Win32K - GRFX allows an authorized attacker to elevate privileges loca Out-of-bounds read in Windows Win32K - GRFX allows an authorized attacker to elevate privileges locally.

CVE-2026-55004 [HIGH] CWE-415 CVE-2026-55004: Double free in Microsoft Printer Drivers allows an authorized attacker to elevate privileges locally Double free in Microsoft Printer Drivers allows an authorized attacker to elevate privileges locally.

CVE-2026-54115 [HIGH] CWE-122 CVE-2026-54115: Integer overflow or wraparound in Windows Active Directory allows an authorized attacker to elevate Integer overflow or wraparound in Windows Active Directory allows an authorized attacker to elevate privileges locally.

CVE-2026-49783 [HIGH] CWE-358 CVE-2026-49783: Improperly implemented security check for standard in Windows Secure Boot allows an authorized attac Improperly implemented security check for standard in Windows Secure Boot allows an authorized attacker to bypass a security feature locally.

CVE-2026-50331 [HIGH] CWE-416 CVE-2026-50331: Use after free in Windows Application Model allows an authorized attacker to elevate privileges loca Use after free in Windows Application Model allows an authorized attacker to elevate privileges locally.

CVE-2026-35415 [HIGH] CWE-190 CVE-2026-35415: Integer overflow or wraparound in Windows Storage Spaces Controller allows an authorized attacker to Integer overflow or wraparound in Windows Storage Spaces Controller allows an authorized attacker to elevate privileges locally.

CVE-2026-40405 [HIGH] CWE-476 CVE-2026-40405: Null pointer dereference in Windows TCP/IP allows an unauthorized attacker to deny service over a ne Null pointer dereference in Windows TCP/IP allows an unauthorized attacker to deny service over a network.

CVE-2026-42837 [HIGH] CWE-125 CVE-2026-42837: Out-of-bounds read in Windows Projected File System Filter Driver allows an authorized attacker to e Out-of-bounds read in Windows Projected File System Filter Driver allows an authorized attacker to elevate privileges locally.

CVE-2026-42828 [HIGH] CWE-126 CVE-2026-42828: Buffer over-read in Windows Projected File System Filter Driver allows an authorized attacker to ele Buffer over-read in Windows Projected File System Filter Driver allows an authorized attacker to elevate privileges locally.

CVE-2026-97799 [HIGH] CWE-347 CVE-2026-97799: Improper verification of cryptographic signature in Windows Audio Service allows an authorized attac Improper verification of cryptographic signature in Windows Audio Service allows an authorized attacker to elevate privileges locally.