Microsoft Windows 11 26H1 vulnerabilities

CVE-2026-69635 [MEDIUM] CWE-122 CVE-2026-69635: Heap-based buffer overflow in Windows Installer allows an authorized attacker to elevate privileges Heap-based buffer overflow in Windows Installer allows an authorized attacker to elevate privileges with a physical attack.

CVE-2026-85790 [MEDIUM] CWE-416 CVE-2026-85790: Use after free in Microsoft QUIC allows an unauthorized attacker to disclose information over a netw Use after free in Microsoft QUIC allows an unauthorized attacker to disclose information over a network.

CVE-2026-70126 [HIGH] CWE-20 CVE-2026-70126: Out-of-bounds read in Windows Bluetooth Port Driver allows an unauthorized attacker to execute code Out-of-bounds read in Windows Bluetooth Port Driver allows an unauthorized attacker to execute code over an adjacent network.

CVE-2026-50354 [HIGH] CWE-416 CVE-2026-50354: 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-2026-83785 [HIGH] CWE-416 CVE-2026-83785: Use after free in Windows COM+ Event System Service allows an authorized attacker to elevate privile Use after free in Windows COM+ Event System Service allows an authorized attacker to elevate privileges locally.

CVE-2026-83505 [HIGH] CWE-367 CVE-2026-83505: Time-of-check time-of-use (toctou) race condition in Windows Setup Files Cleanup allows an authorize Time-of-check time-of-use (toctou) race condition in Windows Setup Files Cleanup allows an authorized attacker to elevate privileges locally.

CVE-2026-69549 [HIGH] CWE-125 CVE-2026-69549: Out-of-bounds read in Virtual Hard Disk (VHD) Miniport Driver allows an authorized attacker to eleva Out-of-bounds read in Virtual Hard Disk (VHD) Miniport Driver allows an authorized attacker to elevate privileges locally.

CVE-2026-83564 [HIGH] CWE-416 CVE-2026-83564: Use after free in Microsoft Windows Search Component allows an authorized attacker to elevate privil Use after free in Microsoft Windows Search Component allows an authorized attacker to elevate privileges locally.

CVE-2026-72955 [HIGH] CWE-416 CVE-2026-72955: Use after free in Windows Application Compatibility Cache allows an authorized attacker to elevate p Use after free in Windows Application Compatibility Cache allows an authorized attacker to elevate privileges locally.

CVE-2026-83575 [HIGH] CWE-416 CVE-2026-83575: Use after free in Microsoft Windows Search Component allows an authorized attacker to elevate privil Use after free in Microsoft Windows Search Component allows an authorized attacker to elevate privileges locally.

CVE-2026-69387 [HIGH] CWE-416 CVE-2026-69387: Use after free in Windows Error Reporting allows an authorized attacker to elevate privileges locall Use after free in Windows Error Reporting allows an authorized attacker to elevate privileges locally.

CVE-2026-83574 [HIGH] CWE-416 CVE-2026-83574: Use after free in Microsoft Windows Search Component allows an authorized attacker to elevate privil Use after free in Microsoft Windows Search Component allows an authorized attacker to elevate privileges locally.

CVE-2026-70156 [HIGH] CWE-416 CVE-2026-70156: Use after free in Microsoft Windows Search Component allows an authorized attacker to elevate privil Use after free in Microsoft Windows Search Component allows an authorized attacker to elevate privileges locally.

CVE-2026-83676 [HIGH] CWE-122 CVE-2026-83676: Integer underflow (wrap or wraparound) in Windows Installer allows an authorized attacker to elevate Integer underflow (wrap or wraparound) in Windows Installer allows an authorized attacker to elevate privileges locally.

CVE-2026-83689 [HIGH] CWE-416 CVE-2026-83689: Use after free in Windows Error Reporting allows an authorized attacker to elevate privileges locall Use after free in Windows Error Reporting allows an authorized attacker to elevate privileges locally.

CVE-2026-85355 [HIGH] CWE-829 CVE-2026-85355: Inclusion of functionality from untrusted control sphere in Windows Common Log File System Driver al Inclusion of functionality from untrusted control sphere in Windows Common Log File System Driver allows an authorized attacker to elevate privileges locally.

CVE-2026-70086 [HIGH] CWE-416 CVE-2026-70086: Use after free in Microsoft Windows Search Component allows an authorized attacker to elevate privil Use after free in Microsoft Windows Search Component allows an authorized attacker to elevate privileges locally.

CVE-2026-70150 [HIGH] CWE-416 CVE-2026-70150: Use after free in Microsoft Windows Search Component allows an authorized attacker to elevate privil Use after free in Microsoft Windows Search Component allows an authorized attacker to elevate privileges locally.

CVE-2026-70136 [HIGH] CWE-416 CVE-2026-70136: Use after free in Microsoft Windows Search Component allows an authorized attacker to elevate privil Use after free in Microsoft Windows Search Component allows an authorized attacker to elevate privileges locally.

CVE-2026-88079 [HIGH] CWE-476 CVE-2026-88079: Null pointer dereference in Windows MIDI Service Module allows an authorized attacker to elevate pri Null pointer dereference in Windows MIDI Service Module allows an authorized attacker to elevate privileges locally.