Microsoft Windows 11 26H1 vulnerabilities

CVE-2026-50335 [HIGH] CWE-284 CVE-2026-50335: Improper access control in Windows Operating Systems allows an authorized attacker to elevate privil Improper access control in Windows Operating Systems allows an authorized attacker to elevate privileges locally.

CVE-2026-50373 [HIGH] CWE-284 CVE-2026-50373: Improper access control in Microsoft Windows Search Component allows an authorized attacker to eleva Improper access control in Microsoft Windows Search Component allows an authorized attacker to elevate privileges locally.

CVE-2026-50351 [HIGH] CWE-284 CVE-2026-50351: Improper access control in Windows Audio Compression Manager (ACM) allows an authorized attacker to Improper access control in Windows Audio Compression Manager (ACM) allows an authorized attacker to elevate privileges locally.

CVE-2026-50346 [HIGH] CWE-285 CVE-2026-50346: Improper authorization in RPC Runtime allows an authorized attacker to elevate privileges locally. Improper authorization in RPC Runtime allows an authorized attacker to elevate privileges locally.

CVE-2026-27919 [HIGH] CWE-822 CVE-2026-27919: Untrusted pointer dereference in Windows Universal Plug and Play (UPnP) Device Host allows an author Untrusted pointer dereference in Windows Universal Plug and Play (UPnP) Device Host allows an authorized attacker to elevate privileges locally.

CVE-2026-97811 [HIGH] CWE-400 CVE-2026-97811: Double free in OpenSSH for Windows allows an authorized attacker to elevate privileges locally. Double free in OpenSSH for Windows allows an authorized attacker to elevate privileges locally.

CVE-2026-42829 [HIGH] CWE-284 CVE-2026-42829: Improper access control in Windows Administrator Protection allows an authorized attacker to bypass Improper access control in Windows Administrator Protection allows an authorized attacker to bypass a security feature locally.

CVE-2026-45637 [HIGH] CWE-416 CVE-2026-45637: Use after free in Windows DWM Core Library allows an authorized attacker to elevate privileges local Use after free in Windows DWM Core Library allows an authorized attacker to elevate privileges locally.

CVE-2026-45605 [HIGH] CWE-416 CVE-2026-45605: Use after free in Windows Bluetooth Service allows an authorized attacker to elevate privileges loca Use after free in Windows Bluetooth Service allows an authorized attacker to elevate privileges locally.

CVE-2026-45600 [HIGH] CWE-843 CVE-2026-45600: Access of resource using incompatible type ('type confusion') in Windows Kernel-Mode Drivers allows Access of resource using incompatible type ('type confusion') in Windows Kernel-Mode Drivers allows an authorized attacker to elevate privileges locally.

CVE-2026-45593 [HIGH] CWE-190 CVE-2026-45593: Use after free in Windows SDK allows an authorized attacker to elevate privileges locally. Use after free in Windows SDK allows an authorized attacker to elevate privileges locally.

CVE-2026-42910 [HIGH] CWE-787 CVE-2026-42910: Out-of-bounds write in Windows Hotpatch Monitoring Service allows an authorized attacker to elevate Out-of-bounds write in Windows Hotpatch Monitoring Service allows an authorized attacker to elevate privileges locally.

CVE-2026-42983 [HIGH] CWE-416 CVE-2026-42983: Use after free in Windows DWM Core Library allows an authorized attacker to elevate privileges local Use after free in Windows DWM Core Library allows an authorized attacker to elevate privileges locally.

CVE-2026-50406 [HIGH] CWE-416 CVE-2026-50406: Use after free in Windows Backup Engine allows an authorized attacker to elevate privileges locally. Use after free in Windows Backup Engine allows an authorized attacker to elevate privileges locally.

CVE-2026-54989 [HIGH] CWE-416 CVE-2026-54989: Use after free in Quality Windows Audio/Video Experience (QWAVE) service allows an authorized attack Use after free in Quality Windows Audio/Video Experience (QWAVE) service allows an authorized attacker to elevate privileges locally.

CVE-2026-50674 [HIGH] CWE-416 CVE-2026-50674: Use after free in Windows USB Print Driver allows an authorized attacker to elevate privileges local Use after free in Windows USB Print Driver allows an authorized attacker to elevate privileges locally.

CVE-2026-50359 [HIGH] CWE-416 CVE-2026-50359: Use after free in Microsoft XML Core Services allows an authorized attacker to elevate privileges lo Use after free in Microsoft XML Core Services allows an authorized attacker to elevate privileges locally.

CVE-2026-50390 [HIGH] CWE-843 CVE-2026-50390: Access of resource using incompatible type ('type confusion') in Windows Kernel allows an authorized Access of resource using incompatible type ('type confusion') in Windows Kernel allows an authorized attacker to elevate privileges locally.

CVE-2026-70579 [HIGH] CWE-125 CVE-2026-70579: Out-of-bounds read in Windows Mobile Broadband allows an unauthorized attacker to disclose informati Out-of-bounds read in Windows Mobile Broadband allows an unauthorized attacker to disclose information over a network.

CVE-2026-50463 [HIGH] CWE-125 CVE-2026-50463: Out-of-bounds read in Windows Kernel allows an unauthorized attacker to disclose information over a Out-of-bounds read in Windows Kernel allows an unauthorized attacker to disclose information over a network.