Microsoft Windows 11 Version 26H1 vulnerabilities

741 known vulnerabilities affecting microsoft/windows_11_version_26h1.

Total CVEs

741

CISA KEV

actively exploited

Public exploits

Exploited in wild

Severity breakdown

CRITICAL23HIGH567MEDIUM146LOW5

Vulnerabilities

SortPage 12 of 38

CVE-2026-50326P3HIGHCVSS 7.8≥ 10.0.28000.0, < 10.0.28000.25252026-07-14

CVE-2026-50326 [HIGH] CWE-416 CVE-2026-50326: Use after free in Windows Unified Consent System allows an authorized attacker to elevate privileges Use after free in Windows Unified Consent System allows an authorized attacker to elevate privileges locally.

nvd

CVE-2026-56643P3HIGHCVSS 7.8≥ 10.0.28000.0, < 10.0.28000.25252026-07-14

CVE-2026-56643 [HIGH] CWE-416 CVE-2026-56643: 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.

nvd

CVE-2026-50353P3HIGHCVSS 7.8≥ 10.0.28000.0, < 10.0.28000.25252026-07-14

CVE-2026-50353 [HIGH] CWE-416 CVE-2026-50353: Use after free in Windows DirectX allows an authorized attacker to elevate privileges locally. Use after free in Windows DirectX allows an authorized attacker to elevate privileges locally.

nvd

CVE-2026-56644P3HIGHCVSS 7.8≥ 10.0.28000.0, < 10.0.28000.25252026-07-14

CVE-2026-56644 [HIGH] CWE-416 CVE-2026-56644: 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.

nvd

CVE-2026-45641P3HIGHCVSS 7.8≥ 10.0.28000.0, < 10.0.28000.22692026-06-09

CVE-2026-45641 [HIGH] CWE-843 CVE-2026-45641: Access of resource using incompatible type ('type confusion') in Windows Hyper-V allows an unauthori Access of resource using incompatible type ('type confusion') in Windows Hyper-V allows an unauthorized attacker to execute code locally.

nvd

CVE-2026-50471P3HIGHCVSS 7.8≥ 10.0.28000.0, < 10.0.28000.25252026-07-14

CVE-2026-50471 [HIGH] CWE-122 CVE-2026-50471: Heap-based buffer overflow in Windows NTFS allows an unauthorized attacker to execute code locally. Heap-based buffer overflow in Windows NTFS allows an unauthorized attacker to execute code locally.

nvd

CVE-2026-34333P3HIGHCVSS 7.8≥ 10.0.28000.0, < 10.0.28000.21132026-05-12

CVE-2026-34333 [HIGH] CWE-190 CVE-2026-34333: Use after free in Windows Win32K - GRFX allows an authorized attacker to elevate privileges locally. Use after free in Windows Win32K - GRFX allows an authorized attacker to elevate privileges locally.

nvd

CVE-2026-58632P3HIGHCVSS 7.8≥ 10.0.28000.0, < 10.0.28000.25252026-07-14

CVE-2026-58632 [HIGH] CWE-416 CVE-2026-58632: Use after free in Windows Win32K allows an authorized attacker to elevate privileges locally. Use after free in Windows Win32K allows an authorized attacker to elevate privileges locally.

nvd

CVE-2026-49791P3HIGHCVSS 7.8≥ 10.0.28000.0, < 10.0.28000.25252026-07-14

CVE-2026-49791 [HIGH] CWE-59 CVE-2026-49791: Improper link resolution before file access ('link following') in Windows Routing and Remote Access Improper link resolution before file access ('link following') in Windows Routing and Remote Access Service (RRAS) allows an authorized attacker to elevate privileges locally.

nvd

CVE-2026-50469P3HIGHCVSS 7.8≥ 10.0.28000.0, < 10.0.28000.25252026-07-14

CVE-2026-50469 [HIGH] CWE-59 CVE-2026-50469: Improper link resolution before file access ('link following') in Windows Projected File System allo Improper link resolution before file access ('link following') in Windows Projected File System allows an authorized attacker to elevate privileges locally.

nvd

CVE-2026-48583P3HIGHCVSS 7.8≥ 10.0.28000.0, < 10.0.28000.22692026-06-09

CVE-2026-48583 [HIGH] CWE-416 CVE-2026-48583: 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.

nvd

CVE-2026-26159P3HIGHCVSS 7.8≥ 10.0.28000.0, < 10.0.28000.18362026-04-14

CVE-2026-26159 [HIGH] CWE-306 CVE-2026-26159: Missing authentication for critical function in Windows Remote Desktop Licensing Service allows an a Missing authentication for critical function in Windows Remote Desktop Licensing Service allows an authorized attacker to elevate privileges locally.

nvd

CVE-2026-26176P3HIGHCVSS 7.8≥ 10.0.28000.0, < 10.0.28000.18362026-04-14

CVE-2026-26176 [HIGH] CWE-122 CVE-2026-26176: Heap-based buffer overflow in Windows Client Side Caching driver (csc.sys) allows an authorized atta Heap-based buffer overflow in Windows Client Side Caching driver (csc.sys) allows an authorized attacker to elevate privileges locally.

nvd

CVE-2026-50333P3HIGHCVSS 7.8≥ 10.0.28000.0, < 10.0.28000.25252026-07-14

CVE-2026-50333 [HIGH] CWE-306 CVE-2026-50333: Missing authentication for critical function in Windows Spaceport.sys allows an authorized attacker Missing authentication for critical function in Windows Spaceport.sys allows an authorized attacker to elevate privileges locally.

nvd

CVE-2026-50459P3HIGHCVSS 7.8≥ 10.0.28000.0, < 10.0.28000.25252026-07-14

CVE-2026-50459 [HIGH] CWE-416 CVE-2026-50459: Use after free in Windows Kernel allows an unauthorized attacker to elevate privileges locally. Use after free in Windows Kernel allows an unauthorized attacker to elevate privileges locally.

nvd

CVE-2026-50696P3HIGHCVSS 7.5≥ 10.0.28000.0, < 10.0.28000.25252026-07-14

CVE-2026-50696 [HIGH] CWE-122 CVE-2026-50696: Heap-based buffer overflow in Windows Internet Key Exchange (IKE) Protocol allows an unauthorized at Heap-based buffer overflow in Windows Internet Key Exchange (IKE) Protocol allows an unauthorized attacker to deny service over a network.

nvd

CVE-2026-50504P3HIGHCVSS 7.5≥ 10.0.28000.0, < 10.0.28000.25252026-07-14

CVE-2026-50504 [HIGH] CWE-126 CVE-2026-50504: Buffer over-read in Remote Desktop Client allows an unauthorized attacker to disclose information ov Buffer over-read in Remote Desktop Client allows an unauthorized attacker to disclose information over a network.

nvd

CVE-2026-42992P3HIGHCVSS 7.5≥ 10.0.28000.0, < 10.0.28000.22692026-06-09

CVE-2026-42992 [HIGH] CWE-122 CVE-2026-42992: Heap-based buffer overflow in Remote Desktop Client allows an unauthorized attacker to execute code Heap-based buffer overflow in Remote Desktop Client allows an unauthorized attacker to execute code over a network.

nvd

CVE-2026-44799P3HIGHCVSS 7.5≥ 10.0.28000.0, < 10.0.28000.22692026-06-09

CVE-2026-44799 [HIGH] CWE-122 CVE-2026-44799: Heap-based buffer overflow in Remote Desktop Client allows an unauthorized attacker to execute code Heap-based buffer overflow in Remote Desktop Client allows an unauthorized attacker to execute code over a network.

nvd

CVE-2026-42993P3HIGHCVSS 7.5≥ 10.0.28000.0, < 10.0.28000.22692026-06-09

CVE-2026-42993 [HIGH] CWE-122 CVE-2026-42993: Heap-based buffer overflow in Remote Desktop Client allows an unauthorized attacker to execute code Heap-based buffer overflow in Remote Desktop Client allows an unauthorized attacker to execute code over a network.

nvd

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