Microsoft Windows 11 Version 26H1 vulnerabilities

CVE-2026-62800 [HIGH] CWE-122 CVE-2026-62800: Heap-based buffer overflow in Windows SMB Server allows an authorized attacker to execute code over Heap-based buffer overflow in Windows SMB Server allows an authorized attacker to execute code over a network.

CVE-2026-88165 [HIGH] CWE-787 CVE-2026-88165: Out-of-bounds write in Active Directory Domain Services allows an authorized attacker to execute cod Out-of-bounds write in Active Directory Domain Services allows an authorized attacker to execute code over a network.

CVE-2026-85931 [HIGH] CWE-122 CVE-2026-85931: Heap-based buffer overflow in Windows Distributed File System (DFS) allows an authorized attacker to Heap-based buffer overflow in Windows Distributed File System (DFS) allows an authorized attacker to execute code over a network.

CVE-2026-50502 [HIGH] CWE-1220 CVE-2026-50502: Insufficient granularity of access control in Windows Event Logging Service allows an authorized att Insufficient granularity of access control in Windows Event Logging Service allows an authorized attacker to execute code over a network.

CVE-2026-105723 [CRITICAL] CWE-822 CVE-2026-105723: Untrusted pointer dereference in Windows Distributed File System (DFS) allows an unauthorized attack Untrusted pointer dereference in Windows Distributed File System (DFS) allows an unauthorized attacker to elevate privileges over a network.

CVE-2026-83693 [CRITICAL] CWE-122 CVE-2026-83693: Heap-based buffer overflow in Windows Error Reporting allows an unauthorized attacker to execute cod Heap-based buffer overflow in Windows Error Reporting allows an unauthorized attacker to execute code over a network.

CVE-2026-83519 [CRITICAL] CWE-122 CVE-2026-83519: Heap-based buffer overflow in Windows Error Reporting allows an unauthorized attacker to execute cod Heap-based buffer overflow in Windows Error Reporting allows an unauthorized attacker to execute code over a network.

CVE-2026-69491 [CRITICAL] CWE-122 CVE-2026-69491: Heap-based buffer overflow in Windows Microsoft DirectMusic allows an unauthorized attacker to execu Heap-based buffer overflow in Windows Microsoft DirectMusic allows an unauthorized attacker to execute code over a network.

CVE-2026-73009 [CRITICAL] CWE-416 CVE-2026-73009: Use after free in Windows Secure Socket Tunneling Protocol (SSTP) allows an unauthorized attacker to Use after free in Windows Secure Socket Tunneling Protocol (SSTP) allows an unauthorized attacker to execute code over a network.

CVE-2026-69276 [CRITICAL] CWE-122 CVE-2026-69276: Integer underflow (wrap or wraparound) in Microsoft UxTheme Library (uxtheme.dll) allows an unauthor Integer underflow (wrap or wraparound) in Microsoft UxTheme Library (uxtheme.dll) allows an unauthorized attacker to execute code over a network.

CVE-2026-69586 [CRITICAL] CWE-122 CVE-2026-69586: Integer overflow or wraparound in Microsoft Windows PDF allows an unauthorized attacker to execute c Integer overflow or wraparound in Microsoft Windows PDF allows an unauthorized attacker to execute code over a network.

CVE-2026-69408 [CRITICAL] CWE-122 CVE-2026-69408: Integer overflow or wraparound in Microsoft Windows Media Foundation allows an unauthorized attacker Integer overflow or wraparound in Microsoft Windows Media Foundation allows an unauthorized attacker to execute code over a network.

CVE-2026-42990 [CRITICAL] CWE-122 CVE-2026-42990: Heap-based buffer overflow in SQL Server ODBC driver allows an unauthorized attacker to execute code Heap-based buffer overflow in SQL Server ODBC driver allows an unauthorized attacker to execute code over a network.

CVE-2026-50447 [CRITICAL] CWE-122 CVE-2026-50447: Heap-based buffer overflow in Windows Message Queuing allows an unauthorized attacker to execute cod Heap-based buffer overflow in Windows Message Queuing allows an unauthorized attacker to execute code over a network.

CVE-2026-83748 [CRITICAL] CWE-122 CVE-2026-83748: Heap-based buffer overflow in Windows Error Reporting allows an unauthorized attacker to execute cod Heap-based buffer overflow in Windows Error Reporting allows an unauthorized attacker to execute code over a network.

CVE-2026-83935 [CRITICAL] CWE-122 CVE-2026-83935: Heap-based buffer overflow in Microsoft XML allows an unauthorized attacker to execute code over a n Heap-based buffer overflow in Microsoft XML allows an unauthorized attacker to execute code over a network.

CVE-2026-97815 [CRITICAL] CWE-122 CVE-2026-97815: Heap-based buffer overflow in Windows Error Reporting allows an unauthorized attacker to execute cod Heap-based buffer overflow in Windows Error Reporting allows an unauthorized attacker to execute code over a network.

CVE-2026-58594 [CRITICAL] CWE-190 CVE-2026-58594: Integer overflow or wraparound in Windows RDP allows an unauthorized attacker to execute code over a Integer overflow or wraparound in Windows RDP allows an unauthorized attacker to execute code over a network.

CVE-2026-50694 [CRITICAL] CWE-416 CVE-2026-50694: Use after free in Windows Secure Socket Tunneling Protocol (SSTP) allows an unauthorized attacker to Use after free in Windows Secure Socket Tunneling Protocol (SSTP) allows an unauthorized attacker to execute code over a network.

CVE-2026-88159 [HIGH] CWE-125 CVE-2026-88159: Use after free in Windows Background Intelligent Transfer Service (BITS) allows an unauthorized atta Use after free in Windows Background Intelligent Transfer Service (BITS) allows an unauthorized attacker to execute code over a network.