Microsoft Windows 11 26H1 vulnerabilities

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-2026-83935 [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-2026-83889 [HIGH] CWE-763 CVE-2026-83889: Release of invalid pointer or reference in DNS Server allows an authorized attacker to execute code Release of invalid pointer or reference in DNS Server allows an authorized attacker to execute code over a network.

CVE-2026-23669 [HIGH] CWE-416 CVE-2026-23669: Use after free in RPC Runtime allows an authorized attacker to execute code over a network. Use after free in RPC Runtime allows an authorized attacker to execute code over a network.

CVE-2026-62784 [HIGH] CWE-122 CVE-2026-62784: Heap-based buffer overflow in Microsoft Local Security Authority Server (lsasrv) allows an authorize Heap-based buffer overflow in Microsoft Local Security Authority Server (lsasrv) allows an authorized attacker to execute code over a network.

CVE-2026-58626 [HIGH] CWE-416 CVE-2026-58626: Use after free in Windows Remote Desktop Services allows an authorized attacker to execute code over Use after free in Windows Remote Desktop Services allows an authorized attacker to execute code over a network.

CVE-2026-50369 [HIGH] CWE-362 CVE-2026-50369: Use after free in Windows Remote Desktop Services allows an authorized attacker to elevate privilege Use after free in Windows Remote Desktop Services allows an authorized attacker to elevate privileges over a network.

CVE-2026-68839 [CRITICAL] CWE-20 CVE-2026-68839: Heap-based buffer overflow in Windows USB Mass Storage Class Driver allows an unauthorized attacker Heap-based buffer overflow in Windows USB Mass Storage Class Driver allows an unauthorized attacker to execute code over a network.

CVE-2026-77493 [CRITICAL] CWE-415 CVE-2026-77493: Double free in Microsoft Graphics Component allows an unauthorized attacker to execute code over a n Double free in Microsoft Graphics Component allows an unauthorized attacker to execute code over a network.

CVE-2026-69493 [CRITICAL] CWE-122 CVE-2026-69493: Out-of-bounds read in Windows Event Logging Service allows an unauthorized attacker to execute code Out-of-bounds read in Windows Event Logging Service allows an unauthorized attacker to execute code over a network.

CVE-2026-69715 [CRITICAL] CWE-122 CVE-2026-69715: Out-of-bounds read in Windows Direct Show allows an unauthorized attacker to execute code over a net Out-of-bounds read in Windows Direct Show allows an unauthorized attacker to execute code over a network.