Microsoft Windows 11 26H1 vulnerabilities

2,149 known vulnerabilities affecting microsoft/windows_11_26h1.

Total CVEs

2,149

CISA KEV

actively exploited

Public exploits

Exploited in wild

Severity breakdown

CRITICAL79HIGH1589MEDIUM477LOW4

Vulnerabilities

SortPage 38 of 108

CVE-2026-50353P3HIGHCVSS 7.8fixed in 10.0.28000.2269fixed in 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 7.8fixed in 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-2026-40399P3HIGHCVSS 7.8fixed in 10.0.28000.21132026-05-12

CVE-2026-40399 [HIGH] CWE-121 CVE-2026-40399: Concurrent execution using shared resource with improper synchronization ('race condition') in Windo Concurrent execution using shared resource with improper synchronization ('race condition') in Windows TCP/IP allows an authorized attacker to elevate privileges locally.

nvd

CVE-2026-34343P3HIGHCVSS 7.8fixed in 10.0.28000.21132026-05-12

CVE-2026-34343 [HIGH] CWE-122 CVE-2026-34343: Heap-based buffer overflow in Windows Application Identity (AppID) Subsystem allows an authorized at Heap-based buffer overflow in Windows Application Identity (AppID) Subsystem allows an authorized attacker to elevate privileges locally.

nvd

CVE-2026-58635P3HIGHCVSS 7.8fixed in 10.0.28000.2269fixed in 10.0.28000.25252026-07-14

CVE-2026-58635 [HIGH] CWE-77 CVE-2026-58635: Improper neutralization of special elements used in a command ('command injection') in Windows Narra Improper neutralization of special elements used in a command ('command injection') in Windows Narrator Braille allows an authorized attacker to elevate privileges locally.

nvd

CVE-2026-85836P3HIGHCVSS 7.8fixed in 10.0.28000.32312026-10-13

CVE-2026-85836 [HIGH] CWE-416 CVE-2026-85836: 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-2026-96308P3HIGHCVSS 7.8fixed in 10.0.28000.32312026-10-13

CVE-2026-96308 [HIGH] CWE-416 CVE-2026-96308: Use after free in Windows Installer allows an authorized attacker to elevate privileges locally. Use after free in Windows Installer allows an authorized attacker to elevate privileges locally.

nvd

CVE-2026-84013P3HIGHCVSS 7.8fixed in 10.0.28000.32312026-10-13

CVE-2026-84013 [HIGH] CWE-416 CVE-2026-84013: Use after free in Windows Telephony Server allows an authorized attacker to elevate privileges local Use after free in Windows Telephony Server allows an authorized attacker to elevate privileges locally.

nvd

CVE-2026-96309P3HIGHCVSS 7.8fixed in 10.0.28000.32312026-10-13

CVE-2026-96309 [HIGH] CWE-416 CVE-2026-96309: Use after free in Windows Subsystem for Linux allows an authorized attacker to elevate privileges lo Use after free in Windows Subsystem for Linux allows an authorized attacker to elevate privileges locally.

nvd

CVE-2026-96223P3HIGHCVSS 7.8fixed in 10.0.28000.32312026-10-13

CVE-2026-96223 [HIGH] CWE-416 CVE-2026-96223: Use after free in Windows Hyper-V allows an authorized attacker to elevate privileges locally. Use after free in Windows Hyper-V allows an authorized attacker to elevate privileges locally.

nvd

CVE-2026-45641P3HIGHCVSS 7.8fixed in 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-2026-49170P3HIGHCVSS 7.8fixed in 10.0.28000.2269fixed in 10.0.28000.25252026-07-14

CVE-2026-49170 [HIGH] CWE-285 CVE-2026-49170: Insufficient granularity of access control in Windows StateRepository API allows an authorized attac Insufficient granularity of access control in Windows StateRepository API allows an authorized attacker to elevate privileges locally.

nvd

CVE-2026-34333P3HIGHCVSS 7.8fixed in 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-2026-50688P3HIGHCVSS 7.8fixed in 10.0.28000.25252026-07-14

CVE-2026-50688 [HIGH] CWE-416 CVE-2026-50688: 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-2026-50490P3HIGHCVSS 7.8fixed in 10.0.28000.2269fixed in 10.0.28000.25252026-07-14

CVE-2026-50490 [HIGH] CWE-416 CVE-2026-50490: Use after free in Windows Installer allows an authorized attacker to elevate privileges locally. Use after free in Windows Installer allows an authorized attacker to elevate privileges locally.

nvd

CVE-2026-54129P3HIGHCVSS 7.8fixed in 10.0.28000.2269fixed in 10.0.28000.25252026-07-14

CVE-2026-54129 [HIGH] CWE-416 CVE-2026-54129: Use after free in Windows Hyper-V allows an authorized attacker to elevate privileges locally. Use after free in Windows Hyper-V allows an authorized attacker to elevate privileges locally.

nvd

CVE-2026-50307P3HIGHCVSS 7.8fixed in 10.0.28000.2269fixed in 10.0.28000.25252026-07-14

CVE-2026-50307 [HIGH] CWE-416 CVE-2026-50307: Use after free in Windows TCP/IP allows an authorized attacker to elevate privileges locally. Use after free in Windows TCP/IP allows an authorized attacker to elevate privileges locally.

nvd

CVE-2026-85322P3HIGHCVSS 7.5fixed in 10.0.28000.32312026-10-13

CVE-2026-85322 [HIGH] CWE-908 CVE-2026-85322: Use of uninitialized resource in Windows Routing and Remote Access Service (RRAS) allows an unauthor Use of uninitialized resource in Windows Routing and Remote Access Service (RRAS) allows an unauthorized attacker to disclose information over a network.

nvd

CVE-2026-71330P3HIGHCVSS 7.5fixed in 10.0.28000.29542026-09-08

CVE-2026-71330 [HIGH] CWE-497 CVE-2026-71330: Exposure of sensitive system information to an unauthorized control sphere in Windows Services for N Exposure of sensitive system information to an unauthorized control sphere in Windows Services for NFS ONCRPC XDR Driver allows an unauthorized attacker to disclose information over a network.

nvd

CVE-2026-70587P3HIGHCVSS 7.5fixed in 10.0.28000.29542026-09-08

CVE-2026-70587 [HIGH] CWE-170 CVE-2026-70587: Improper null termination in Windows Remote Desktop Protocol allows an unauthorized attacker to disc Improper null termination in Windows Remote Desktop Protocol allows an unauthorized attacker to disclose information over a network.

nvd

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